Patent US2709471A successfully refreshed from Google Patents.
Patent US2445028A successfully refreshed from Google Patents.
US2445028A
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Method of dispersing keratin proteins with amides and the composition resulting therefrom
Assignee: United States Department of Agriculture
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Filing: 1947-05-08
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Granted: 1948-07-13
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Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Chase B Jones
- 👤 Dale K Mecham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
D; D01; D01F; D01F4/00; C; C08; C08H; C08H1/00; C08H1/06; C08L; C08L89/00; C08L89/04; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |