Prosecution Insights
Last updated: May 29, 2026
Application No. 18/023,855

WATER DIGGER

Non-Final OA §112
Filed
Feb 28, 2023
Priority
Aug 31, 2020 — SO 2020/05406 +1 more
Examiner
YAO, THEODORE N
Art Unit
3676
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Alexei Egmar Krass De Krassnokutski
OA Round
2 (Non-Final)
68%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
193 granted / 285 resolved
+15.7% vs TC avg
Strong +38% interview lift
Without
With
+37.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
36 currently pending
Career history
329
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
81.1%
+41.1% vs TC avg
§102
3.9%
-36.1% vs TC avg
§112
9.7%
-30.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 285 resolved cases

Office Action

§112
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 . Response to Arguments Applicant’s remarks have sufficiently addressed the issues raised in the Office Action dated 7/3/25. The examiner notes the objections to the claims presented below, specifically regarding the presentation of claim amendments. However, no re-submission is requested for this claim set. The examiner respectfully requests that applicant be mindful in future submissions. Applicant’s arguments with respect to claim(s) 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. Please note the new 112(b) rejections, particularly necessitated by applicant’s amendments, presented below as well as a discussion of the best available prior art. Applicant is additionally advised of resources which may be available for filing pro se applications. Please see: https://www.uspto.gov/patents/basics/using-legal-services/pro-se-assistance-program Claim Objections The claims are objected to because of the following informalities: The examiner respectfully reminds application of the requirements for the submission of claim amendments under 37 CFR 1.121(c). Upon closer examination of the claims, they do not appear to conform to this requirement. As a mere example, in claim 1, the previously examined claims recited: “a number of augers projecting substantially regularly and horizontally from the central portion”. The limitations pertaining to at least “projecting substantially regularly and horizontally from the central portion” do not appear in the claim (and they are neither stricken through). As another example, claim 12 previously recited “hydrostatically bearings”. There appear to be claim amendments where text was removed, but, this is not reflected by the appropriate markings. Presentation of the claims as required under 37 CFR 1.121(c) facilitates the efficient examination of the claims. And the examiner respectfully requests that any future submission conform with these requirements. Appropriate correction is required. 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. Please see at least claim 9, discussed in the office action of 7/3/25. 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1, 5-6, and 8-14 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim limitation “control unit” in Claim 1 has been evaluated under the three-prong test set forth in MPEP § 2181, subsection I, but the result is inconclusive. Thus, it is unclear whether this limitation should be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the recitation of “central control unit” lacks any structurally imparting limitations (the recitation of having a vertical height and upper and lower portions does not impart meaningful structural limitations) and recites functions e.g. “control” and a particular configuration. The limitation additionally uses the generic placeholder term “unit”. It is additionally noted that there is not textual support in the specification for the term. Although the term may appear to refer to elements seen in the drawings, if 112(f) should be invoked, it is unclear which elements should be construed as being a part of the “central control unit”. The boundaries of this claim limitation are ambiguous; 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. In response to this rejection, applicant must clarify whether this limitation should be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. Mere assertion regarding applicant’s intent to invoke or not invoke 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph is insufficient. Applicant may: (a) Amend the claim to clearly invoke 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, by reciting “means” or a generic placeholder for means, or by reciting “step.” The “means,” generic placeholder, or “step” must be modified by functional language, and must not be modified by sufficient structure, material, or acts for performing the claimed function; (b) Present a sufficient showing that 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, should apply because the claim limitation recites a function to be performed and does not recite sufficient structure, material, or acts to perform that function; (c) Amend the claim to clearly avoid invoking 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, by deleting the function or by reciting sufficient structure, material or acts to perform the recited function; or (d) Present a sufficient showing that 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, does not apply because the limitation does not recite a function or does recite a function along with sufficient structure, material or acts to perform that function. Dependent claims 5-6, and 8-14 are rejected for their dependence from an indefinite claim. The term “close together” in claim 1 is a relative term which renders the claim indefinite. The term “close” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. Dependent claims 5-6, and 8-14 are rejected for their dependence from an indefinite claim. The term “substantially in the shape a three-pointed star” in claim 1 is a relative term which renders the claim indefinite. The term “substantially in the shape of a three-pointed star” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. In other words, it is unclear when a potentially infringing device would no longer be sufficiently ‘substantially star-shaped’. Dependent claims 5-6, and 8-14 are rejected for their dependence from an indefinite claim. Claim 9 recites the limitation "the underlying mud". There is insufficient antecedent basis for this limitation in the claim. However, it appears that this is attempting to refer to the previously recited “mud” and should only recite “the mud”. Allowable Subject Matter Claims 1, 5-6, and 8-14 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: As discussed, Gray (US 20220080480 A1) is the best available piece of prior art. However, Gray does not teach the “central control unit” as best understood, if construed to impart the structural particulars seen in Figures 1-4 and 9, for example, and more particularly the series of tubes and their arrangement and functionality. Additionally, Gray does not teach the arrangement of the augers, as best understood. McCarty (US 8136465 B2), specifically Figure 4, is relevant in teaching the arrangement of 3 devices 14a-14c around a vessel. But it is unclear whether this should be regarded as “substantially in the shape a three-pointed star”, as required by the claim. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to THEODORE N YAO whose telephone number is (571)272-8745. The examiner can normally be reached typically 8am-4pm ET. 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, TARA SCHIMPF can be reached at (571) 270-7741. 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. /THEODORE N YAO/Primary Examiner, Art Unit 3676
Read full office action

Prosecution Timeline

Show 1 earlier event
Jul 03, 2025
Non-Final Rejection mailed — §112
Oct 03, 2025
Response Filed
Oct 03, 2025
Response after Non-Final Action
Nov 05, 2025
Applicant Interview (Telephonic)
Nov 05, 2025
Examiner Interview Summary
Nov 07, 2025
Response Filed
Nov 17, 2025
Final Rejection mailed — §112
Jan 05, 2026
Response after Non-Final Action

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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
68%
Grant Probability
99%
With Interview (+37.6%)
2y 10m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 285 resolved cases by this examiner. Grant probability derived from career allowance rate.

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