Prosecution Insights
Last updated: April 19, 2026
Application No. 18/258,352

FILTRATE VAT ASSEMBLY FOR A FILTER PRESS

Non-Final OA §112
Filed
Jun 20, 2023
Examiner
ROYCE, LIAM A
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Metso Outotec Finland OY
OA Round
1 (Non-Final)
65%
Grant Probability
Moderate
1-2
OA Rounds
2y 10m
To Grant
87%
With Interview

Examiner Intelligence

Grants 65% of resolved cases
65%
Career Allow Rate
339 granted / 522 resolved
At TC average
Strong +22% interview lift
Without
With
+21.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
39 currently pending
Career history
561
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
44.3%
+4.3% vs TC avg
§102
17.8%
-22.2% vs TC avg
§112
33.2%
-6.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 522 resolved cases

Office Action

§112
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 . Drawings The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, the collector element must be shown or the feature(s) canceled from the claim(s). No new matter should be entered. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. The figure or figure number of an amended drawing should not be labeled as “amended.” If a drawing figure is to be canceled, the appropriate figure must be removed from the replacement sheet, and where necessary, the remaining figures must be renumbered and appropriate changes made to the brief description of the several views of the drawings for consistency. Additional replacement sheets may be necessary to show the renumbering of the remaining figures. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Claim Interpretation The following is a quotation of 35 U.S.C. 112(f): (f) Element in Claim for a Combination. – An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The following is a quotation of pre-AIA 35 U.S.C. 112, sixth paragraph: An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The claims in this application are given their broadest reasonable interpretation using the plain meaning of the claim language in light of the specification as it would be understood by one of ordinary skill in the art. The broadest reasonable interpretation of a claim element (also commonly referred to as a claim limitation) is limited by the description in the specification when 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is invoked. As explained in MPEP § 2181, subsection I, claim limitations that meet the following three-prong test will be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph: (A) the claim limitation uses the term “means” or “step” or a term used as a substitute for “means” that is a generic placeholder (also called a nonce term or a non-structural term having no specific structural meaning) for performing the claimed function; (B) the term “means” or “step” or the generic placeholder is modified by functional language, typically, but not always linked by the transition word “for” (e.g., “means for”) or another linking word or phrase, such as “configured to” or “so that”; and (C) the term “means” or “step” or the generic placeholder is not modified by sufficient structure, material, or acts for performing the claimed function. Use of the word “means” (or “step”) in a claim with functional language creates a rebuttable presumption that the claim limitation is to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites sufficient structure, material, or acts to entirely perform the recited function. Absence of the word “means” (or “step”) in a claim creates a rebuttable presumption that the claim limitation is not to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is not interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites function without reciting sufficient structure, material or acts to entirely perform the recited function. Claim limitations in this application that use the word “means” (or “step”) are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. Conversely, claim limitations in this application that do not use the word “means” (or “step”) are not being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. This application includes one or more claim limitations that do not use the word “means,” but are nonetheless being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the claim limitation(s) uses a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the generic placeholder is not preceded by a structural modifier. Such claim limitation(s) is/are: Collector element in claim 14. Because this/these claim limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, it/they is/are being interpreted to cover the corresponding structure described in the specification as performing the claimed function, and equivalents thereof. If applicant does not intend to have this/these limitation(s) interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, applicant may: (1) amend the claim limitation(s) to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph (e.g., by reciting sufficient structure to perform the claimed function); or (2) present a sufficient showing that the claim limitation(s) recite(s) sufficient structure to perform the claimed function so as to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. Claim Objections Claim 3 line(s) 4 sets forth the limitation “PUR”, which appears to be an abbreviation of “polyurethane”. Please clarify the claim, e.g. - - PUR (polyurethane) - - without adding new matter. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. Claims 3-6,8-16 are rejected under 35 U.S.C. 112(b) as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. Claim 3 line(s) 3-4 sets forth the limitation “preferably […]” renders the claim indefinite because it is unclear whether the limitations are part of the claimed invention. See MPEP § 2173.05(d). Regarding claim 3, the phrase “such as” renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). Claim 5 line(s) 3 sets forth the limitation “the position of the recess”. There is insufficient antecedent basis for this limitation in the claim. Claim 5 line(s) 4 sets forth the limitation “the gasket”. There is insufficient antecedent basis for this limitation in the claim. Claim 5 line(s) 5 sets forth the limitation “the former”. There is insufficient antecedent basis for this limitation in the claim. Claim 5 line(s) 5 sets forth the limitation “the latter”. There is insufficient antecedent basis for this limitation in the claim. Claim 6 line(s) 3-4 sets forth the limitation “preferably […]” renders the claim indefinite because it is unclear whether the limitations are part of the claimed invention. See MPEP § 2173.05(d). Claim 8 line(s) 6 sets forth the limitation “the shape and position of the attachment studs”. There is insufficient antecedent basis for this limitation in the claim. Claim 10 line(s) 5-6 sets forth the limitation “the shape and position of the attachment studs”. There is insufficient antecedent basis for this limitation in the claim. Regarding claim 14, Claim limitation “collector element” invokes 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. However, the written description fails to disclose the corresponding structure, material, or acts for performing the entire claimed function and to clearly link the structure, material, or acts to the function. Neither the specification as originally filed nor the drawings describe any structure of a “collector element”. Therefore, the claim is indefinite and is rejected under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph. Applicant may: (a) Amend the claim so that the claim limitation will no longer be interpreted as a limitation under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph; (b) Amend the written description of the specification such that it expressly recites what structure, material, or acts perform the entire claimed function, without introducing any new matter (35 U.S.C. 132(a)); or (c) Amend the written description of the specification such that it clearly links the structure, material, or acts disclosed therein to the function recited in the claim, without introducing any new matter (35 U.S.C. 132(a)). If applicant is of the opinion that the written description of the specification already implicitly or inherently discloses the corresponding structure, material, or acts and clearly links them to the function so that one of ordinary skill in the art would recognize what structure, material, or acts perform the claimed function, applicant should clarify the record by either: (a) Amending the written description of the specification such that it expressly recites the corresponding structure, material, or acts for performing the claimed function and clearly links or associates the structure, material, or acts to the claimed function, without introducing any new matter (35 U.S.C. 132(a)); or (b) Stating on the record what the corresponding structure, material, or acts, which are implicitly or inherently set forth in the written description of the specification, perform the claimed function. For more information, see 37 CFR 1.75(d) and MPEP §§ 608.01(o) and 2181. Claim 14 line(s) 3 sets forth the limitation “the remaining filtrate vat assembly”. There is insufficient antecedent basis for this limitation in the claim. Claim 16 line(s) 2-3 sets forth the limitation “the vat assembly is suitable for a horizontal filter press, such as a tower press”. It is unclear whether “a horizontal filter press” and/or “a tower press” is required structure of the claim or just the intended use of the vat assembly. Regarding claim 16, the phrase “such as” renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). Allowable Subject Matter Claims 1-17 have allowable subject matter over the prior art of record. The prior art neither teaches, suggests, nor makes obvious to one having ordinary skill in the art a filtrate vat assembly and filter press comprising the combination of claimed elements. FRESENIUS (US 5045191) discloses a non-clogging filtrate outlet stopper for use in a plate filter press (title, Figs.) including: a filtrate vat (Fig. 1 #3) defining a receptacle being laterally delimited by a border (Fig. 1 #1) elevated from a base of the receptacle and open towards a side opposing the base, an outlet opening (Fig. 1 #4,7) extending laterally through the border is formed, thereby providing a fluid drainage route from the receptacle, and wherein the filtrate vat assembly further comprises a lid (Figs. 1-2 #8) covering the outlet opening from the side opposing the base. SEITZ WERKE (GB 907503) discloses improvements in or relating to filter plates for filter presses (title, Figs.) including: a filtrate vat (area within border #10) defining a receptacle being laterally delimited by a border (Figs. 1-2 #10) elevated from a base of the receptacle and open towards a side opposing the base, an outlet opening (Figs. 1,2 #13,14) extending laterally through the border is formed, thereby providing a fluid drainage route from the receptacle, and wherein the filtrate vat assembly further comprises a lid (Fig. 2 #18) covering the outlet opening from the side opposing the base. DAVIS (US 6716347) discloses wear resistant inserts for filter press plates. PARTTI (US 20190015764) discloses a horizontal pressure filter collector element, horizontal pressure filter plate element, and a horizontal pressure filter. NEV (US 4826593) discloses a membrane filter press (title, Figs.) including a gap is provided on a border, such that an outlet opening extending laterally through the border is formed, thereby providing a fluid drainage route from a receptacle, the gap being open towards a side opposing a base. Telephonic Inquiries Any inquiry concerning this communication or earlier communications from the examiner should be directed to LIAM A ROYCE whose telephone number is (571)270-0352. The examiner can normally be reached M-F ~08:00~15:00. 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, Benjamin Lebron can be reached at (571)272-0475. 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. LIAM A. ROYCE Primary Examiner Art Unit 1777 /Liam Royce/ Primary Examiner, Art Unit 1777
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Prosecution Timeline

Jun 20, 2023
Application Filed
Mar 02, 2026
Non-Final Rejection — §112 (current)

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

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Prosecution Projections

1-2
Expected OA Rounds
65%
Grant Probability
87%
With Interview (+21.7%)
2y 10m
Median Time to Grant
Low
PTA Risk
Based on 522 resolved cases by this examiner. Grant probability derived from career allow rate.

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