Prosecution Insights
Last updated: April 19, 2026
Application No. 16/994,144

A Microfluidic Device for Culturing Cells Comprising A Biowall, A Bead Bed and A Biointerface and Methods of Modelling Said Biointerface Thereof

Final Rejection §112
Filed
Aug 14, 2020
Examiner
HASSAN, LIBAN M
Art Unit
1799
Tech Center
1700 — Chemical & Materials Engineering
Assignee
National Research Council Of Canada
OA Round
6 (Final)
50%
Grant Probability
Moderate
7-8
OA Rounds
4y 2m
To Grant
81%
With Interview

Examiner Intelligence

Grants 50% of resolved cases
50%
Career Allow Rate
226 granted / 452 resolved
-15.0% vs TC avg
Strong +31% interview lift
Without
With
+31.3%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
45 currently pending
Career history
497
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
44.2%
+4.2% vs TC avg
§102
14.5%
-25.5% vs TC avg
§112
34.8%
-5.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 452 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 . 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 16-18, 20-21, 23, 25 and 27-28 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 1 recites the limitations "a source of rigid beads" in line 5, and “the kit assembled with: the porous packing of rigid beads” in lines 14-15. However, it is unclear if the rigid beads are positively recited in the claim, because the claim appears to require the rigid beads to be both material worked upon and an element of the kit. Further clarification is requested and appropriate correction is required. Claim 25 is also rejected for the same reason and the claim requires additional sources of rigid beads. Claim(s) 17-18, 20-21, 23 and 27-28 are included in this rejection by virtue of their dependency upon a rejected base claim. Appropriate correction is required. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 27-28 are rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 27 is rejected because the limitation “wherein the kit is assembled with the porous packing of rigid beads formed within the central region and the cover enclosing and sealing the chamber” fails to define additional structural elements to the apparatus claims, since said limitation already recited in independent claim 16. Claim 27 is rejected because the limitation “a biowall formed located along a segment of the fencing separating the central region from one flanking channel of said flanking channels, the biowall formed at least in part by live cells cultured on the beads, the biowall being alimented by at least one of the microfluidic ports” fails to define additional structural elements to the apparatus claims, since said limitation already recited in independent claim 16. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Allowable Subject Matter Claim 16 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. Claim 17-18, 20-21, 23, 25 and 27-28, would be allowable if rewritten 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 and to include all of the limitations of the base claim and any intervening claims. Response to Arguments Applicant’s arguments with respect to claim(s) December 12, 2025 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. With respect the Applicant’s remarks regarding the previously applied reference, it should be noted that the new ground of rejection presented in the pervious Office Action was necessitated by the Applicant’s claim amendments. The newly found prior art reference was the most pertinent reference to the claimed invention of the claim set dated 04-16-2025. 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 LIBAN M HASSAN whose telephone number is (571)270-7636. The examiner can normally be reached on 8:30 AM - 5:00 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, Michael Marcheschi can be reached on 5712721374. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /LIBAN M HASSAN/Primary Examiner, Art Unit 1799
Read full office action

Prosecution Timeline

Aug 14, 2020
Application Filed
Mar 09, 2023
Non-Final Rejection — §112
Apr 27, 2023
Response Filed
Aug 12, 2023
Final Rejection — §112
Nov 16, 2023
Request for Continued Examination
Nov 20, 2023
Response after Non-Final Action
May 11, 2024
Non-Final Rejection — §112
Sep 13, 2024
Response Filed
Dec 14, 2024
Final Rejection — §112
Apr 16, 2025
Request for Continued Examination
Apr 18, 2025
Response after Non-Final Action
Sep 16, 2025
Non-Final Rejection — §112
Dec 12, 2025
Response Filed
Mar 19, 2026
Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12595456
CELL OBSERVATION DEVICE, ELECTROSTIMULATION DEVICE, AND CELL OBSERVATION METHOD
2y 5m to grant Granted Apr 07, 2026
Patent 12589366
Impeller and Sparger Assemblies for a Bioprocessing System
2y 5m to grant Granted Mar 31, 2026
Patent 12584087
BIOLOGICAL CULTURE UNIT
2y 5m to grant Granted Mar 24, 2026
Patent 12559708
CELL COLLECTING DEVICE AND CELL COLLECTING METHOD
2y 5m to grant Granted Feb 24, 2026
Patent 12553017
APPARATUS FOR MICROSCOPIC BIOLOCIGAL ORGANISM OBSERVATION
2y 5m to grant Granted Feb 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

7-8
Expected OA Rounds
50%
Grant Probability
81%
With Interview (+31.3%)
4y 2m
Median Time to Grant
High
PTA Risk
Based on 452 resolved cases by this examiner. Grant probability derived from career allow rate.

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