US2820741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum aspirin granulation and method for making
Assignee: Abbott Laboratories
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Filing: 1954-04-29
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Granted: 1958-01-21
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Endicott
- 👤 Thomas A Prickett
- 👤 Albert A Dallavis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/4841; A61K9/4866; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1635; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A DENSE GRANULAR PRODUCT SUITABLE FOR ENCAPSULATING WHICH COMPRISES, NORMALLY LIGHT AND FLUFFY ALUMINUM ASPIRIN POWDER AND ABOUT 2% BY WEIGHT OF POLYVINYLPYRROLIDONE, BASED ON THE WEIGHT OF ASPIRIN.
Claim 2
Dependent Claim
29 words
A DENSE GRANULAR PRODUCT SUITABLE FOR ENCAPSULATING WHICH COMPRISES, NORMALLY LIGHT AND FLUFFY ALUMINUM ASPIRIN POWDER AND ABOUT 2% BY WEIGHT OF POLYVINYLPYRROLIDONE, BASED ON THE WEIGHT OF ASPIRIN.
References Cited (Backward Citations)
US2671749A
Cited
BE507692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |