Prosecution Insights
Last updated: October 02, 2026
Application No. 17/655,593

METHOD FOR COLOURING A METAL AND COLOURED METAL

Non-Final OA §103§112
Filed
Mar 21, 2022
Priority
Apr 08, 2021 — EU 21167303.3
Examiner
LAW, NGA LEUNG V
Art Unit
1717
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Comadur SA
OA Round
7 (Non-Final)
57%
Grant Probability
Moderate
7-8
OA Rounds
0m
Est. Remaining
77%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allowance Rate
314 granted / 554 resolved
-8.3% vs TC avg
Strong +21% interview lift
Without
With
+20.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
36 currently pending
Career history
604
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
60.4%
+20.4% vs TC avg
§102
9.2%
-30.8% vs TC avg
§112
25.4%
-14.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 554 resolved cases

Office Action

§103 §112
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . The Applicant's amendment filed on August 10, 2026 was received. Claim 1 was amended. Claims 3-6, 8, 10, 12, 15-17 and 22-23 were canceled. No claim was added. The text of those sections of Title 35. U.S.C. code not included in this action can be found in the prior Office Action Issued June 2, 2026. Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on August 10, 2026 has been entered. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-2, 7, 9, 11, 13-14, 18-21 and 24-27 rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Regarding claim 1, instant specification and the original claims do disclose “the part to be treated is fixed on a top surface of a support part” as claimed. There is not discussion of which surface of the support part that the part is being fixed on. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim rejections under 35 U.S.C. 103 as being unpatentable Gupta (Decorative black coatings on titanium surfaces based on hard bi-layered carbon coatings synthesized by carbon implantation) in view of Busardo (US20190032198) on claims Claims 1-2, 14, 18 and 20-21 are withdrawn, because the claims have been amended. Claims 1-2, 7, 9, 11, 14, 18 and 20-21 are rejected under 35 U.S.C. 103 as being unpatentable Gupta (Decorative black coatings on titanium surfaces based on hard bi-layered carbon coatings synthesized by carbon implantation) in view of Busardo (US20190032198) and Grossenbacher (US20110259753). Regarding claim 1, Gupta teaches a method of forming decorative black coatings on metallic surface (abstract). Gupta teaches to load a Ti metal substate in a implanter chamber at a base pressure of 7X10-8 hPa, (vacuum) for implanting ions on the surface to obtain the black color, wherein carbon monoxide is used as the precursor gas in the ion source to form a positive ion beam(C+ ion, mono charged ions) (page 387 2.1 Synthesis) (implanting mono ions selected from carbon in a surface layer of the part to be treated by directing towards the part to be treated a ono charged ion beam produced by a source of mono charged ions in a vacuum, a color of the part being changed to a desired color by the charged ions striking the part and penetrating into the surface of the part). Gupta teaches black color is desired by the correct fluence and the black color is shown right after the implantation (page 387 2.1 Synthesis, see figure 1), thus, Gupta teaches toe observe a change of the color of the part to the desired color (black) during implanting of the mono charged ions and interrupting the implanting in the vacuum when the desired color is observed. Gupta does not explicitly teach the ion beam is composed of a mixture of ions having different degrees of ionization. However, Busardo teaches a method of coloring metal by implanting an ion beam of mono and multicharged ions on the surface of the metal (abstract, paragraphs 0001-0002, 0015 and 0018 and 0024, see figure 1). Busardo teaches ion beam comprising both mono and multicharged ions mean ions of one and the same gas exhibiting different charge states, which reads on the limitations of “ion beam is composed of mixture of ions having different degrees of ionization” (paragraph 0027). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use the ion beam composed of a mixture of ions having different degrees of ionization as suggested by Busardo in the method of Gupta, because Busardo teaches it is more effective to conduct the bombardment (ion implantation) with both mono and multicharged ions than with just mono charged ions (paragraph 0026). Gupta teaches the black coatings on the titanium surface is intended for watch making (page 386 1. Introduction), but Gupta in view of Busardo does not explicitly teach the metal (titanium surface) is fixed on a support part insensitive to the ion plantation treatment. However, Grossenbacher teaches a method of making an inlaid ceramic element for a watch (paragraphs 0003 and 0012) (watch making, which is same as Gupta) and discloses the watch made with ceramic bezel is decorated with metal component (paragragraphs 0003 and 0005-0012), wherein the metal component 14/15/16 is embedded in the ceramic body 11 (the part to be treated is fixed on a top surface of a support part, wherein the support part is a ceramic part) (paragraphs 0033-0035, see figures 6-8), where such metal component comprises Ti (paragraphs 0034 and 0043) and the metal component provides aesthetic decoration for the watch (paragraph 0036), which is similar goal for the black coating on Ti surface in Gupta. The part is considered to be fixed on at least a portion of the top surface of the ceramic part as it is on the top surface of the recess formed on the ceramic part. Thus, It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to fix the metal (Ti) on the ceramic watch component (support part) as suggested by Grossenbacher in the method of Gupta in view of Busardo because Grossenbacher teaches such the metal (Ti) can form decorative elements, such as scale or a brand name, on the ceramic component (paragraphs 0003 and 0012), and Gupta teaches the ion implantation can further form decorative black coating on the Ti metal for watch making. It is the position of the examiner that property of the support part is insensitive to the ion implanting, is inherent, given that the method and material (ion implantation process and the specific ions, metal/Ti part on the ceramic support) disclosed by Gupta in view of Busardo and Grossenbacher and the present application are the same. A reference which is silent about a claimed invention's features is inherently anticipatory if the missing feature is necessarily present in than which is described in the reference. Inherency is not established by probabilities or possibilities. In re Robertson, 49 USPQ2d 1949(1999). Regarding claim 2, Gupta does not explicitly teach the ion source is an ECR ion source. However, Busardo teaches the ion source is an ECR (electron cyclotron resonance) ion source (paragraph 0026 and 0051). It would have been obvious to one of ordinary skill in the art at the time the invention was made to use ECR ion source for ion implanting on a metal surface as suggested by Busardo in the method of Gupta because Busardo teaches the ECR is effective and has the advantage of being compact and economical in energy (paragraphs 0026 and 0051). Regarding claims 7, Grossenbacher teaches the support part is an external part (paragraph 0012, see figure 1). Regarding claims 9, Grossenbacher teaches the external part is intended for watchmaking (see figure 1, paragraphs 0003 and 0012). Regarding claim 11, Grossenbacher teaches the external part is watch bezel, bracelet or case (paragraph 0012). Regarding claim 14, Gupta teaches the part is titanium (abstract, page 387 2.1 Synthesis). Regarding claim 18, Gupta teaches all limitations of this claim except the claimed parameters. However, Busardo teaches the ions are accelerated under voltages of 5kV to 1000kV (paragraph 0020), which overlaps with the claimed range. Busardo teaches the ions intensity if 5mA (paragraph 0061). Busardo teaches the ion dose is 1016 ions/cm2 to 1019 ions/cm2 (paragraph 0019), which overlaps with the claimed range. In the case where the claimed ranges “overlap or lie inside ranges disclosed by the prior art" a prima facie case of obviousness exist. In re Wertheim, 541 F.2d 257, 191USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990); In re Geisler,116 F.3d 1465, 1469-71, 43 USPQ2d 1362, 1365-66 (Fed. Cir. 1997). See MPEP 2144.05. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to apply the parameters suggested by Busardo in the method of Gupta because Busardo teaches they are appropriate for ion implantation on metal surface for coloring (paragraph 0019). In addition, It would have been obvious to one having ordinary skill in the art to have determined the optimum values of the relevant process parameters through routine experimentation in the absence of showing of criticality. In re Aller, USPQ 233 (CCPA 1955). Regarding claim 20, Gupta teaches all the limitations of this claim, except the annealing heat treatment. However, Busardo teaches to heat treat the implanted metal (paragraphs 0021-0022). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to heat treat the ion implanted substrate as suggested by Busardo in the method of Gupta because Busardo teaches the heat treatment can promote the color change (paragraphs 0036 and 0024-0025). Regarding claim 21, It is noted that claim 21 is a product-by-process claim. “Even though product-by-process claims are limited by and defined by the process, determination of the patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in a product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process. In re Thrope, 777 F.2d 695, 698, 227 USPQ 94, 966 (Fed. Cir. 1985). The colored metal disclosed by Gupta in view of Busardo and Grossenbacher (colored metal with mono and multi-charged ions implanted on the titanium metal surface, the part is fixed on a top surface of a support part, the part being a ceramic part) (abstract, page 387 2.1 Synthesis; Busardo paragraphs 0026-0027) is similar to that of the Applicant’s, thus, Applicant’s process is not given patentable weight in this claim. Gupta in view of Busardo discloses all limitations of this claim. In addition, it will be obvious to have the same product as the claimed invention as the process are the same (see claim 1 rejections). Claims 13 and 27 are rejected under 35 U.S.C. 103 as being unpatentable over Gupta (Decorative black coatings on titanium surfaces based on hard bi-layered carbon coatings synthesized by carbon implantation) in view of Busardo (US20190032198) and Grossenbacher (US20110259753) as applied to claims 1-2, 7, 9, 11, 14, 18 and 20-21 above, and further in view of Bae (KR20090042648). Regarding claim 13, Gupta in view of Busardo teaches all limitations of this claim, except the metal is precious metal. However, Bae teaches a method of coating a material to implement various colors in the material by ion implantation (abstract, paragraphs 0020-0021). Bae teaches the gold and titanium (Gupta’s metal) and functional equivalent metal to be colored by carbon ion implantation (paragraphs 0020-0021 and 0032-0034). Therefore, it would have been obvious to one of ordinary skill in the art to substitute gold for titanium as the metal in the method as disclosed by Gupta in view of Busardo. Regarding claim 27, Gupta in view of Busardo teaches all limitations of this claim, except the metal part is made of aluminum zirconium and the mono or multi charged ion is nitrogen. However, Bae teaches the aluminum zirconium and titanium (Gupta’s metal) and functional equivalent metal to be colored by ion implantation, and nitrogen can replace the carbon ions (paragraphs 0020-0021 and 0032-0034). Therefore, it would have been obvious to one of ordinary skill in the art to substitute aluminum zirconium for titanium as the metal, and nitrogen for carbon ions, in the method as disclosed by Gupta in view of Busardo to obtained the desired color. Since Bae teaches the color changes is due to the ions, the blue color is intrinsic for the nitrogen ions implantation in the aluminum zirconium alloy. Claims 19 and 24 are rejected under 35 U.S.C. 103 as being unpatentable Gupta (Decorative black coatings on titanium surfaces based on hard bi-layered carbon coatings synthesized by carbon implantation) in view of Busardo (US20190032198) and Grossenbacher (US20110259753) as applied to claims 1-2, 7, 9, 11, 14, 18 and 20-21 above, and further in view of Matossian (EP0499215). Regarding claim 19, Gupta in view of Busardo teaches all the limitations of this claim, except the color is blue or violet. However, Matossian teaches a method of ion implantation on the metal surface to change the color (page 5 lines 12-35). Matossian teaches when O2+ ions are implanted to titanium, the visible color of the surface will change to blue (page 5 lines 12-35). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use oxygen ion for implantation as suggested by Matossian to replace the carbon ions in the method of Gupta in view of Busardo, because Matossian teaches oxygen ions implantation on the titanium produces blue color (page 5 lines 25-35), and the visible color is based on the type of implanted ions (page 5 lines 12-25). Regarding claim 24, Gupta in view of Busardo teaches all the limitations of this claim, except the implanting ions is nitrogen ions and the color is gold. However, Matossian teaches a method of ion implantation on the metal surface to change the color (page 5 lines 12-35). Matossian teaches when N2+ ions are implanted to titanium, the visible color of the surface will change to gold (page 5 lines 12-35, page 6 lines 50-58). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use nitrogen ion for implantation as suggested by Matossian to replace the carbon ions in the method of Gupta in view of Busardo, because Matossian teaches nitrogen ions implantation on the titanium produces gold color (page 5 lines 25-35), and the visible color is based on the type of implanted ions (page 5 lines 12-25). Claims 25-26 are rejected under 35 U.S.C. 103 as being unpatentable Gupta (Decorative black coatings on titanium surfaces based on hard bi-layered carbon coatings synthesized by carbon implantation) in view of Busardo (US20190032198) and Grossenbacher (US20110259753) as applied to claims 1-2, 7, 9, 11, 14, 18 and 20-21 above, and further in view of Matossian (EP0499215) and Cors (CH705973) Regarding claim 25, Gupta in view of Busardo teaches all the limitations of this claim, except the implanting ions is nitrogen ions and the color is blue. However, Matossian teaches a method of ion implantation on the metal surface to change the color (page 5 lines 12-35). Matossian teaches when N2+ ions are implanted to titanium, the visible color of the surface will change to gold (page 5 lines 12-35, page 6 lines 50-58). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use nitrogen ion for implantation as suggested by Matossian to replace the carbon ions in the method of Gupta in view of Busardo, because Matossian teaches nitrogen ions implantation on the titanium produces gold color (page 5 lines 25-35), and the visible color is based on the type of implanted ions (page 5 lines 12-25). Cors further teaches the color of the TiN can be adjusted accordingly to the power of discharges and the nitrogen content of the titanium nitride, and the color includes blue (paragraph 0043). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to adjust the amount of the nitrogen in TiN as suggested by Cors in the method of Gupta in view of Busardo and Matossian because Cors teaches it can adjust the color of TiN to other color, such as blue (paragraph 0043). Regarding claim 26, Gupta in view of Busardo teaches all the limitations of this claim, except the implanting ions is nitrogen ions and the color is blue. However, Matossian teaches a method of ion implantation on the metal surface to change the color (page 5 lines 12-35). Matossian teaches when N2+ ions are implanted to titanium, the visible color of the surface will change to gold (page 5 lines 12-35, page 6 lines 50-58). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use nitrogen ion for implantation as suggested by Matossian to replace the carbon ions in the method of Gupta in view of Busardo, because Matossian teaches nitrogen ions implantation on the titanium produces gold color (page 5 lines 25-35), and the visible color is based on the type of implanted ions (page 5 lines 12-25). Therefore, it would have been within the skill of the ordinary artisan to adjust and optimize the amount of the nitrogen in the TiN in the process to yield the desired color. Discovery of optimum value of result effective variable in known process is ordinarily within skill of art. In re Boesch, CCPA 1980, 617 F. 2d 272, 205 USPQ215. Cors further teaches the color of the TiN can be adjusted accordingly to the power of discharges and the nitrogen content of the titanium nitride, and the color includes blue and other color (maybe violet) (paragraph 0043). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to adjust the amount of the nitrogen in TiN as suggested by Cors in the method of Gupta in view of Busardo and Matossian because Cors teaches it can adjust the color of TiN to other color, such as blue or voilet (paragraph 0043). Therefore, it would have been within the skill of the ordinary artisan to adjust and optimize the amount of the nitrogen in the TiN in the process to yield the desired color. Discovery of optimum value of result effective variable in known process is ordinarily within skill of art. In re Boesch, CCPA 1980, 617 F. 2d 272, 205 USPQ215. Response to Arguments Applicant's arguments filed on August 10, 2026 have been fully considered but they are not persuasive. Applicant’s principal arguments are: Gupta and Grossenbacher do not teach the new features, specifically, the galvanic deposition 16 of Grossenbacher is fille into a recess 12 of the ceramic body 11. There is no apparent reason to modify Gupta so as to arrive at Applicant’s claimed inventions. In response to Applicant’s arguments, please consider the following comments: As discussed above, the metal/part is considered to be fixed on at least a portion of the top surface of the ceramic part as it is on the top surface of the recess formed on the ceramic part. In response to applicant's arguments against the references individually, one cannot show nonobviousness by attacking references individually where the rejections are based on combinations of references. See In re Keller, 642 F.2d 413, 208 USPQ 871 (CCPA 1981); In re Merck & Co., 800 F.2d 1091, 231 USPQ 375 (Fed. Cir. 1986). As discussed above, Grupta is intended to form decorative black coating on a Ti metal in the process of watch making, wherein Grossenbacher teaches to benefit of having metal surface (function as decorative feature) fixed on a ceramic support. Thus, It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to fix the metal (Ti) on the ceramic watch component (support part) as suggested by Grossenbacher in the method of Gupta in view of Busardo because Grossenbacher teaches such the metal (Ti) can form decorative elements, such as scale or a brand name, on the ceramic component (paragraphs 0003 and 0012), and Gupta teaches the ion implantation can further form decorative black coating on the Ti metal for watch making. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to NGA LEUNG V LAW whose telephone number is (571)270-1115. The examiner can normally be reached M-F 8 am - 5 pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Dah-Wei Yuan can be reached on 5712721295. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /NGA LEUNG V LAW/Examiner, Art Unit 1717
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Prosecution Timeline

Show 12 earlier events
Dec 17, 2025
Response after Non-Final Action
Jan 13, 2026
Non-Final Rejection mailed — §103, §112
Feb 24, 2026
Response Filed
Jun 02, 2026
Final Rejection mailed — §103, §112
Jul 07, 2026
Response after Non-Final Action
Aug 10, 2026
Request for Continued Examination
Aug 12, 2026
Response after Non-Final Action
Sep 01, 2026
Non-Final Rejection mailed — §103, §112 (current)

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Prosecution Projections

7-8
Expected OA Rounds
57%
Grant Probability
77%
With Interview (+20.7%)
3y 2m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 554 resolved cases by this examiner. Grant probability derived from career allowance rate.

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