Prosecution Insights
Last updated: April 19, 2026
Application No. 18/451,481

CLEANING SYSTEM FOR CLEANING A FLOOR OF A CLOSED SYSTEM

Non-Final OA §102§103§112
Filed
Aug 17, 2023
Examiner
SOTO, CHRISTOPHER ASHLEY
Art Unit
3723
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Bristola LLC
OA Round
1 (Non-Final)
54%
Grant Probability
Moderate
1-2
OA Rounds
2y 9m
To Grant
82%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allow Rate
59 granted / 110 resolved
-16.4% vs TC avg
Strong +29% interview lift
Without
With
+28.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
57 currently pending
Career history
167
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
47.1%
+7.1% vs TC avg
§102
22.8%
-17.2% vs TC avg
§112
26.0%
-14.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 110 resolved cases

Office Action

§102 §103 §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 . 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 4-6 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. Claims 4-6, which depend on claim 1, recite: “a surface level created by the liquid within the closed system”. Claim 1 recites: “a surface level created by the liquid within the closed system”. As claimed, it is unclear whether the surface level recited in claims 4-6 are the same surface level introduced in claim 1 or an entirely different surface level. For examination purposes, the limitation of “a surface level” recited in claims 4-6 has been construed as the same surface level introduced in claim 1, Claim Rejections - 35 USC § 102 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. Claims 1-8, 10-16, and 18-23 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Krajicek (US 4945933 A). Referring to claim 1: Krajicek discloses a cleaning system (shown in Fig. 1; “cleaning the interior of storage tanks of the type used for storing large volumes of liquids” Abstract) for cleaning a floor (floor of 100 shown in Fig. 3) of a closed system (100 Figs. 2 and 3) containing liquid, the system comprising: a cleaner (300/ 500 Figs. 2 and 3); wherein the cleaner is configured to clean the floor (floor of 100 shown in Fig. 3) of the closed system (100 Figs. 2 and 3); wherein the cleaner is configured to selectively enter and exit (selectively enter and exit via 110/116 Figs. 2 and 3) the closed system (100 Figs. 2 and 3); wherein the cleaner enters (enters via 110/116 Figs. 2 and 3) the closed system (100 Figs. 2 and 3) at a position located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3). Referring to claim 2: Krajicek discloses the system of claim 1, further comprising: a gate complex (110/116 Figs. 2 and 3; “gate valve 110” Col. 14, lines 33-38); wherein the gate complex (110/116 Figs. 2 and 3) is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system (100 Figs. 2 and 3); wherein the gate complex (110/116 Figs. 2 and 3) is located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3). Referring to claim 3: Krajicek discloses the system of claim 1, further comprising: a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the closed system (100 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3). Referring to claim 4: Krajicek discloses the system of claim 1, wherein: a gate complex (110/116 Figs. 2 and 3); wherein the gate complex is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system (100 Figs. 2 and 3); wherein the gate complex (110/116 Figs. 2 and 3) is located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system; the gate complex having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); and wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner (300/ 500 Figs. 2 and 3) is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 5: Krajicek discloses the system of claim 1, further comprising: a gate complex (110/116 Figs. 2 and 3); wherein the gate complex is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system (100 Figs. 2 and 3); wherein the gate complex (110/116 Figs. 2 and 3) is located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3); the gate complex having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3); wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 6: Krajicek discloses the system of claim 1, further comprising: a gate complex (110/116 Figs. 2 and 3); wherein the gate complex is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system (100 Figs. 2 and 3); wherein the gate complex (110/116 Figs. 2 and 3) is located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system; the gate complex having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3); wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex(110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system; wherein when the gate (116 Figs. 2 and 3) is in the open position (116 Figs. 2 and 3), liquid from within the closed system (100 Figs. 2 and 3) flows into (“the gate valve plate 116 and thereby, as shown in FIG. 3, establish fluid communication between the interior of the storage tank 100 and the isolation barrel 200.” Col. 21, lines 52-55) the interior volume (shown in Figs. 2 and 3) of the box system (200 Figs. 2 and 3) and is contained therein. Referring to claim 7: Krajicek discloses the system of claim 1, wherein the cleaner (300/ 500 Figs. 2 and 3) is attached to a waste discharge line (120 Fig. 1; “drain line pipe 120” Col. 24, line 6), and wherein the waste discharge line is configured to transfer material away from the closed system (100 Figs. 2 and 3). Referring to claim 8: Krajicek discloses the system of claim 1, wherein the cleaner is a remote controlled cleaner (“wherein the rotation of the nozzled outlet jets is controlled by indexing power means outside the tank” Col. 8, lines 8-10). Referring to claim 10: Krajicek discloses a cleaning system (shown in Fig. 1; “cleaning the interior of storage tanks of the type used for storing large volumes of liquids” Abstract) for cleaning a floor (floor of 100 shown in Fig. 3) of a closed system (100 Figs. 2 and 3) containing liquid, the system comprising: a gate complex (110/116 Figs. 2 and 3; “gate valve 110” Col. 14, lines 33-38); wherein the gate complex is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system; wherein the gate complex (110/116 Figs. 2 and 3) is located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3); a cleaner (300/ 500 Figs. 2 and 3); wherein the cleaner is configured to clean the floor (floor of 100 shown in Fig. 3) of the closed system (100 Figs. 2 and 3); wherein the cleaner is configured to enter (enters via 110/116 Figs. 2 and 3) the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3). Referring to claim 11: Krajicek discloses the system of claim 10, further comprising: a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3). Referring to claim 12: Krajicek discloses the system of claim 10, wherein: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); and wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3). Referring to claim 13: Krajicek discloses the system of claim 10, further comprising: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system; wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 14: Krajicek discloses the system of claim 10, further comprising: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3); wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system; wherein when the gate (116 Figs. 2 and 3) is in the open position (116 Figs. 2 and 3), liquid from within the closed system (116 Figs. 2 and 3) flows into (“the gate valve plate 116 and thereby, as shown in FIG. 3, establish fluid communication between the interior of the storage tank 100 and the isolation barrel 200.” Col. 21, lines 52-55) the interior volume (shown in Figs. 2 and 3) of the box system (200 Figs. 2 and 3) and is contained therein. Referring to claim 15: Krajicek discloses the system of claim 10, wherein the cleaner (300/ 500 Figs. 2 and 3) is attached to a waste discharge line (300/ 500 Figs. 2 and 3), and wherein the waste discharge line is configured to transfer material away from the closed system (100 Figs. 2 and 3). Referring to claim 16: Krajicek discloses the system of claim 10, wherein the cleaner is a remote controlled cleaner (“wherein the rotation of the nozzled outlet jets is controlled by indexing power means outside the tank” Col. 8, lines 8-10). Referring to claim 18: Krajicek discloses a cleaning system (shown in Fig. 1; “cleaning the interior of storage tanks of the type used for storing large volumes of liquids” Abstract) for cleaning a floor (floor of 100 shown in Fig. 3) of a closed system (100 Figs. 2 and 3) containing liquid, the system comprising: a gate complex (110/116 Figs. 2 and 3; “gate valve 110” Col. 14, lines 33-38); wherein the gate complex is configured to allow selective access (selective access via 116 Figs. 2 and 3) into the closed system; wherein the gate complex (110/116 Figs. 2 and 3) is located below a surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3); a box system (200 Figs. 2 and 3); the box system having an interior volume (shown in Figs. 2 and 3); wherein the box system (200 Figs. 2 and 3) is configured to operably connect to the gate complex (110/116 Figs. 2 and 3); a cleaner (300/ 500 Figs. 2 and 3); wherein the cleaner is configured to clean the floor (floor of 100 shown in Fig. 3) of the closed system (100 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is initially positioned at least partially within the interior volume (shown partially within in Fig. 2) of the box system (200 Figs. 2 and 3); wherein the cleaner (300/ 500 Figs. 2 and 3) is configured to enter the closed system through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 19: Krajicek discloses the system of claim 18, wherein: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); and wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 20: Krajicek discloses the system of claim 18, further comprising: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate (116 Figs. 2 and 3) is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); wherein when the gate (116 Figs. 2 and 3) is in the open position (shown in Fig. 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system. Referring to claim 21: Krajicek discloses the system of claim 18, further comprising: the gate complex (110/116 Figs. 2 and 3) having a gate (116 Figs. 2 and 3); wherein the gate is configured to be selectively moved between an open position and a closed position (“a valve plate 116 may be raised and lowered” Col. 14, lines 36-37); wherein when the gate (116 Figs. 2 and 3) is in the open position (116 Figs. 2 and 3), the cleaner is configured to enter the closed system (100 Figs. 2 and 3) through the gate complex (110/116 Figs. 2 and 3) located below the surface level (surface level of 102 shown in Figs. 2 and 3) created by the liquid within the closed system (100 Figs. 2 and 3); wherein when the gate is in the open position, liquid from within the closed system flows into (“the gate valve plate 116 and thereby, as shown in FIG. 3, establish fluid communication between the interior of the storage tank 100 and the isolation barrel 200.” Col. 21, lines 52-55) the interior volume (shown in Figs. 2 and 3) of the box system (200 Figs. 2 and 3) and is contained therein. Referring to claim 22: Krajicek discloses the system of claim 18, wherein the cleaner (300/ 500 Figs. 2 and 3) is attached to a waste discharge line (120 Fig. 1; “drain line pipe 120” Col. 24, line 6), and wherein the waste discharge line is configured to transfer material away from the closed system (100 Figs. 2 and 3). Referring to claim 23: Krajicek discloses the system of claim 18, wherein the cleaner is a remote controlled cleaner (“wherein the rotation of the nozzled outlet jets is controlled by indexing power means outside the tank” Col. 8, lines 8-10). 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. Claims 9, 17, and 24 are rejected under 35 U.S.C. 103 as being unpatentable over Krajicek (US 4945933 A) and Tatum (US 3543948 A). Referring to claim 9: Krajicek discloses the system of claim 1, but is silent on wherein the cleaner is an auger cleaner. Tatum in an analogous removal system (shown in Fig. 1) wherein the cleaner (12 Fig. 1) is an auger cleaner (shown in Fig. 1) It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the cleaning system of Krajicek with the auger as taught by Tatum for the purpose of having a mechanism which is capable of extracting the unnecessary matter. Referring to claim 17: Krajicek discloses the system of claim 10, but is silent on wherein the cleaner is an auger cleaner. Tatum in an analogous removal system (shown in Fig. 1) wherein the cleaner (12 Fig. 1) is an auger cleaner (shown in Fig. 1) It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the cleaning system of Krajicek with the auger as taught by Tatum for the purpose of having a mechanism which is capable of extracting the unnecessary matter. Referring to claim 24: Krajicek discloses the system of claim 18, but is silent on wherein the cleaner is an auger cleaner. Tatum in an analogous removal system (shown in Fig. 1) wherein the cleaner (12 Fig. 1) is an auger cleaner (shown in Fig. 1) It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the cleaning system of Krajicek with the auger as taught by Tatum for the purpose of having a mechanism which is capable of extracting the unnecessary matter. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTOPHER SOTO whose telephone number is (571)272-8172. The examiner can normally be reached Monday-Friday, 8a.m. - 5 p.m.. 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, Monica Carter can be reached at 571-272-4475. 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. CHRISTOPHER SOTO Examiner Art Unit 3723 /CHRISTOPHER SOTO/Examiner, Art Unit 3723 /MONICA S CARTER/Supervisory Patent Examiner, Art Unit 3723
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Prosecution Timeline

Aug 17, 2023
Application Filed
Jan 20, 2026
Non-Final Rejection — §102, §103, §112
Mar 12, 2026
Interview Requested
Mar 25, 2026
Applicant Interview (Telephonic)
Mar 25, 2026
Examiner Interview Summary

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Prosecution Projections

1-2
Expected OA Rounds
54%
Grant Probability
82%
With Interview (+28.9%)
2y 9m
Median Time to Grant
Low
PTA Risk
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