Prosecution Insights
Last updated: April 19, 2026
Application No. 16/952,673

COMPOSITIONS AND METHODS OF USE OF BETA-HYDROXY-BETA-METHYLBUTYRATE (HMB) FOR JOINT STABILITY

Final Rejection §103
Filed
Nov 19, 2020
Examiner
PUTTLITZ, KARL J
Art Unit
1646
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Metabolic Technologies, LLC
OA Round
4 (Final)
69%
Grant Probability
Favorable
5-6
OA Rounds
2y 8m
To Grant
87%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allow Rate
974 granted / 1409 resolved
+9.1% vs TC avg
Strong +18% interview lift
Without
With
+18.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
58 currently pending
Career history
1467
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
37.5%
-2.5% vs TC avg
§102
11.3%
-28.7% vs TC avg
§112
26.8%
-13.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1409 resolved cases

Office Action

§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 . The rejection under section 103 is maintained: 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 5-14 remain rejected under 35 U.S.C. 103 as being unpatentable over: U.S. Publication Nos. 20160066610, 20160038457, and 20150057350, assigned to Abbott Laboratories (collectively “Abbott Applications”); WO 2010068696 (WO 696); or U.S. Publication No. 20100179112 to Rathmacher et al. (Rathmacher); in view of: Knoop et al., J Rehabil Med 2014; 46: 703–707; Knoop et al., Physiotherapy 101 (2015) 171-177 (Knoop references); or Messier et al., Arthritis & Rheumatism (Arthritis Care & Research) Vol. 47, No. 2, April 15, 2002, pp 141–148 (Messier); or CN 105727247, downloaded 28 November 2023 from: https://patents.google.com/patent/CN105727247A/en?oq=105727247+ (CN 247). All references previously cited. The Abbott Applications teach that a certain level of muscle function is necessary for mobility and carrying out activities of daily living. A decline in muscle function can have a number of adverse effects on an individual including, but not limited to, general weakness, fatigue, a lessening of joint mobility, a reduction in physical activities…, see paragraph 0003 of the ‘457 application. Also, the Abbott Applications teach that extended bed rest or physical inactivity may lead to a number of complications such as low-grade inflammation (Hojbjerre, L., et al., Diabetes Care 34(10): 2265-2272, 2011), cardiovascular complications (Sonne, M. P., et al., Exp Physiol 96(10): 1000-1009, 2011), rapid muscle atrophy, and degenerative joint disease (Dittmer, D. K., et al., Can Fam Physician 39: 1428-1432, 1435-1437, 1993). Such complications may be related to the development of fibrosis in tissue due to dysregulated matrix metalloproteinase (MMP) activity. The development of fibrosis may in turn lead to the development of other conditions or complications such as arthritis, atherosclerosis, nephritis, tissue ulcers, aneurysms, and muscle atrophy, see paragraph 0003 of the ‘350 application. In order to reduce fibrosis, increase muscle regeneration and decrease muscle function decline, the Abbott Applications teach the administration of compositions comprising HMB (“[a]lso provided is a method of reducing the effect of prolonged physical inactivity on the development of fibrosis in a subject who is experiencing or is expected to experience prolonged physical inactivity in the near future by administering a therapeutically effective amount of a leucine metabolite (e.g., β-hydroxy-β-methylbutyric acid (HMB)) to the subject….[c]ompositions and methods for enhancing the regenerative capacity of an individual are provided. The compositions include, and the methods provide, a combination of an effective amount of epigallocatechin-3-gallate (EGCg) and an effective amount of β-hydroxy-β-methylbutyrate (HMB) to decrease the level of intramuscular FGF2, to enhance the regenerative capacity of muscle, or both.”). The Abbott Applications clearly demonstrate the relationship between muscle and joint health, namely, a decline in muscle function can have a number of adverse effects on joint mobility and joint health. Within this context, the Abbott Applications teach that compositions comprising HMB can increase muscle regeneration, decrease fibrosis and decrease muscle decline, and invariably, benefits joint health. In this relationship, see also Rathmacher (“A method for increasing muscle mass of an animal in need thereof comprising the steps of administering to said animal HMB and Vitamin D in amounts sufficient to increase muscle mass, wherein upon said administration of HMB and Vitamin D to the animal, said muscle mass is increased”, see claim 20.) WO 696 also teaches administration of HMB and vitamin D to increase muscle mass strength and functionality, see abstract, for example. The primary references may not teach improving joint stability or treating joint inflammation, joint damage, and/or joint injury. However, the secondary references teach that muscle mass and muscle contractions are essential to maintain functional joints. The loss of muscle mass can lead to joint instability and affect the joint function, which may then lead to inflammation and eventually arthritis. See Applicant’s remarks dated 8/17/2019 in a reply filed in parent application 15/405,880, citing the Knoop references and Messier: PNG media_image1.png 325 975 media_image1.png Greyscale PNG media_image2.png 482 975 media_image2.png Greyscale See Remarks dated 8/27/2019, 15/405,880, pp. 6-7. In this manner, increasing muscle mass with HMB necessarily improves joint instability and joint function, as admitted by Applicant. Nonetheless, CN 247 teaches a parental drink for relieving joint chronic strain comprising B- hydroxy-B methylbutyric acid calcium, see example 8 of Machine Translation, previously provided. In this way, those of ordinary skill could have applied the HMB compositions taught by the primary references in a predictable fashion for the purposes of improving joint health. Specifically, the references teach that the particular known technique of improving muscle health with HMB was within the ordinary capabilities of those of ordinary skill. Since the references also demonstrate that muscle and joint health are recognized as invariably interconnected, those of ordinary skill would have recognized that applying the known technique would have yielded a reasonable expectation of improving joint health. Accordingly, applying HMB compositions for improving joint health would have been prima facie obvious. The claims have been amended to recite increasing muscle mass in the limb contralateral to the effected joint, thereby improving neuromuscular balance and joint stability. The claims also recite increasing strength in a limb contralateral to the affected joint, thereby compensating for the joint instability caused by the joint inflammation, joint damage, and/or joint injury. Again, those of ordinary skill would recognize that administration of HMB, as taught by the references, would necessarily increase muscle mass and strength in the limb contralateral to the effected joint, see MPEP 2112.01 (“Products of identical chemical composition can not have mutually exclusive properties.” In re Spada, 911 F.2d 705, 709, 15 USPQ2d 1655, 1658 (Fed. Cir. 1990). A chemical composition and its properties are inseparable. Therefore, if the prior art teaches the identical chemical structure, the properties applicant discloses and/or claims are necessarily present.”). See also In re Woodruff "discovering and claiming a new benefit of an old process cannot render the process again patentable." 919 F. 2d 1575, 1578 (Fed. Cir. 1990). As mentioned previously, Applicant Remarks dated 8/27/2019, 15/405,880, pp. 6-7, describe how increasing muscle mass with HMB necessarily improves joint instability and joint function, which was as admitted by Applicant. As outlined above, with regard to improving increasing contralateral muscle mass and strength, those of ordinary skill would recognize that administration of HMB, as taught by the references, would necessarily improve balanced movement and increase muscle mass and strength, including increasing muscle mass in the side of the body contralateral to the site of joint inflammation, damage and injury. Any other observed effect, such as improved balanced movement, would also be a necessary aspect of HMB administration. Applicant argues that: Not all administration of HMB results in contralateral effects; Not all contralateral muscle gain translates to joint stabilization; Not one cited reference teaches or predicts the contralateral stabilization mechanism; and Contralateral strength targeting is a purposeful therapeutic strategy, not an inevitable outcome. However, the references teach a decline in muscle function can have a number of adverse effects on an individual including a lessening of joint mobility and that increasing muscle mass can be achieved by administering HMB. In this manner, the references provide a reason to administer HMB to those with joint instability and injury. Any other observed effects, such as those mentioned by applicant, or recited in the claims, would have been an invariable aspect of this administration. Moreover, the claims do not recite any differences in the manner of administration of HMB from that disclosed in the references which would translate into differences in contralateral effects or joint stabilization. Therefore, the rejection is maintained. THIS ACTION IS MADE FINAL. 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KARL J PUTTLITZ whose telephone number is (571)272-0645. The examiner can normally be reached on Monday to Friday from 9 a.m. to 5 p.m. If attempts to reach the examiner by telephone are unsuccessful, the examiner's acting supervisor, Gregory Emch, can be reached at telephone number 571-272-8149. 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). /KARL J PUTTLITZ/ Primary Examiner, Art Unit 1646
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Prosecution Timeline

Nov 19, 2020
Application Filed
Nov 28, 2023
Non-Final Rejection — §103
Jun 03, 2024
Response Filed
Jul 09, 2024
Final Rejection — §103
Jan 13, 2025
Request for Continued Examination
Jan 16, 2025
Response after Non-Final Action
Jan 21, 2025
Non-Final Rejection — §103
Jul 23, 2025
Response Filed
Jul 23, 2025
Response after Non-Final Action
Nov 21, 2025
Response Filed
Feb 12, 2026
Final Rejection — §103 (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

5-6
Expected OA Rounds
69%
Grant Probability
87%
With Interview (+18.2%)
2y 8m
Median Time to Grant
High
PTA Risk
Based on 1409 resolved cases by this examiner. Grant probability derived from career allow rate.

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