Prosecution Insights
Last updated: May 29, 2026
Application No. 18/172,545

MICROTRENCHING BLADES WITH REPLACEABLE CUTTERS

Non-Final OA §102§103
Filed
Feb 22, 2023
Priority
Feb 23, 2022 — provisional 63/313,093
Examiner
PEZZUTO, ROBERT ERIC
Art Unit
3671
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
The Charles Machine Works Inc.
OA Round
2 (Non-Final)
85%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allowance Rate
1093 granted / 1283 resolved
+33.2% vs TC avg
Moderate +9% lift
Without
With
+9.4%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
22 currently pending
Career history
1309
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
51.9%
+11.9% vs TC avg
§102
25.6%
-14.4% vs TC avg
§112
12.0%
-28.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1283 resolved cases

Office Action

§102 §103
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim 1 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Curry, Jr. (USPGPub 2020/0222999). Regarding claim 1: Curry discloses an apparatus comprising: a disc (as seen in figure 2, generally 18) having a center (as seen in figure 2, area of 30) and terminal periphery (as seen in figure 2, area of 26); and a plurality of tooth assemblies (as seen in figures 2 and 3, 42, 46), comprising: a cartridge (as seen in figure 4, at 42) attached to the periphery of the disc, the cartridge having a cavity opening away from the center of the disc (as seen in annotated figure below); and a tooth (as seen in figure 4, at 46) configured for removable attachment to the cartridge (as seen between figures 3 and 4). PNG media_image1.png 318 259 media_image1.png Greyscale Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. Claims 2-4 are rejected under 35 U.S.C. 103 as being unpatentable over Curry, Jr. (USPGPub 2020/0222999) in view of Davis (USP 3,614,164). Regarding claim 2: Curry discloses the apparatus of claim 1 substantially as discussed above. Further, Curry discloses the tooth comprises a body (as seen in figure 4, area of 46) having a forward cutting face (as seen in figures 3 and 4, via unnumbered inserts) but fails to show the cavity defining a profile as discussed by the applicant or the projection defining a cross-hole. However, Davis teaches that it is well known in the excavating art to provide such a combination in concert with an excavating device. Davis discloses wherein a cavity defines a profile (as seen in figure 1), and: a projection extending from a body (as seen in figure 1, area of 10), wherein the projection has an external profile complementary to the profile of the cavity (as seen in exploded view in figure 1 and assembled view in figure 3), and wherein the projection defines a cross-hole (as seen in figure 1, at 20 in the projection). Therefore it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to provide the device of Curry with the teachings of Davis since it would be a simple matter of combining prior art elements according to known methods to yield the predictable results of a tooth assembly having a tooth more positively secured due to a complimentary cartridge sizing and being surrounded thereby that cartridge. Regarding claim 3: Curry as modified by Davis discloses the apparatus of claim 2. Further, Davis discloses wherein the apparatus comprising a pin (as seen in figure 1, at 22) configured for placement in the cross-hole (as seen in assembled figure 3, at 22). Regarding claim 4: Curry as modified by Davis discloses the apparatus of claim 2. Further, Davis discloses wherein the cartridge comprises a channel, the channel having a first opening within the cavity and a second opening at a surface of the cartridge, wherein the channel is substantially radially oriented (as seen in annotated figure 1 below). PNG media_image2.png 229 257 media_image2.png Greyscale Claims 5-9, 11 and 12 are rejected under 35 U.S.C. 103 as being unpatentable over Curry, Jr. (USPGPub 2020/0222999) in view of Davis (USP 3,614,164) as applied to claims 2-4 above, and further in view of Kopinski et al. (USP 5,184,412).. Regarding claims 5-7: Curry as modified by Davis discloses the apparatus of claim 4 substantially as discussed above but fails to discloses the use of a shim made of a rubber material. However, Kopinski teaches that it is well known within the excavating or earthworking tooth assembly art to employ such shims in concert with those tooth assemblies (as seen in figures 1-7). Kopinski discloses the use of a rubber (column 5, lines 49-51) shim member (as seen in figure 4, generally 8) wherein the shim member is placed in a channel (as seen in figure 6) between a cavity (as seen in figure 6, area between members 14) and a projection (as seen in figure 6, area of 40) extending into the cavity whereby the shim contacts the projection at a first opening (as seen in figure 5, area of 54 and annotated figure 6 below). PNG media_image3.png 266 299 media_image3.png Greyscale Therefore it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to provide the device of Curry as modified by Davis with the teachings of Kopinski since it would be a simple matter of combining prior art elements according to known methods to yield the predictable results of a tooth assembly having a shim member whereby that shim member would allow for a better sealing of connections between allied members as well as to taking advantage of the inherent shock absorbing characteristics of such a member and therein allow for greater operational effectiveness and greater longevity of working parts. Regarding method claims 8, 9 ,11 and 12: In view of the structure disclosed by Curry as modified by Davis and Kopinski, the method of replacing a tooth would be obvious since it is the normal and logical means by which a tooth could be replaced. Allowable Subject Matter Claims 13-17 are allowed. Response to Arguments Applicant’s arguments with respect to claims 1-9, 11 and 12 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROBERT ERIC PEZZUTO whose telephone number is (703)756-1320. The examiner can normally be reached Monday-Friday 7am-3:30pm. 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, Joseph M. Rocca can be reached at 571-272-8971. 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. /ROBERT E PEZZUTO/Examiner, Art Unit 3671
Read full office action

Prosecution Timeline

Feb 22, 2023
Application Filed
Nov 24, 2025
Non-Final Rejection mailed — §102, §103
Feb 16, 2026
Response Filed
Mar 27, 2026
Non-Final Rejection mailed — §102, §103 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
85%
Grant Probability
95%
With Interview (+9.4%)
2y 1m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1283 resolved cases by this examiner. Grant probability derived from career allowance rate.

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