US2474339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keratin derivatives and process of preparation thereof
Assignee: Individual
•
Filing: 1946-11-22
•
Granted: 1949-06-28
•
Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Wilfred H Ward
- 👤 Charles H Binkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
C; C08; C08L; C08L89/00; C08L89/04; A; A23; A23J; A23J1/00; A23J1/10; A23K; A23K10/00; A23K10/20; A23K10/26; Y; Y10; Y10S; Y10S530/00; Y10S530/827
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2007633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |