US2879161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable dry powder compositions containing choline chloride and methods of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1956-05-14
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Granted: 1959-03-24
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 Valentine William
- 👤 Joseph F Weidenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:25
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/13; A61K31/14; A23; A23K; A23K40/00; A23K40/10; A61K47/00; A61K47/02; A61K9/00; A61K9/14; A61K9/16; Y; Y10; Y10S; Y10S426/00; Y10S426/806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A STABLE, SUBSTANTIALLY DRY, FREE-FLOWING POWDER COMPRISING CHOLINE CHLORIDE AND A SILICA AEROGEL, SAID POWDER CONTAINING NOT SUBSTANTIALLY MORE THAN 65% CHOLINE CHLORIDE ON AN ANHYDROUS WEIGHT BASIS, SAID SILICA AEROGEL HAVING A SURFACE AREA OF FROM ABOUT 100 TO ABOUT 400 SQUARE METERS/GRAM AND BEING PRESENT IN AN AMOUNT NOT SUBSTANTIALLY LESS THAN ABOUT 35% BY WEIGHT.
Claim 2
Dependent Claim
58 words
A STABLE, SUBSTANTIALLY DRY, FREE-FLOWING POWDER COMPRISING CHOLINE CHLORIDE AND A SILICA AEROGEL, SAID POWDER CONTAINING NOT SUBSTANTIALLY MORE THAN 65% CHOLINE CHLORIDE ON AN ANHYDROUS WEIGHT BASIS, SAID SILICA AEROGEL HAVING A SURFACE AREA OF FROM ABOUT 100 TO ABOUT 400 SQUARE METERS/GRAM AND BEING PRESENT IN AN AMOUNT NOT SUBSTANTIALLY LESS THAN ABOUT 35% BY WEIGHT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |