US2414858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tanning of proteins
Assignee: Strathmore Paper Co
•
Filing: 1940-12-04
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Granted: 1947-01-28
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Expires: 1960-12-04
Abstract
No abstract record available.
Inventors
- 👤 Paul B Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/22; C; C08; C08L; C08L89/00; C08L89/04; C08L89/06; D06; D06M; D06M15/00; D06M15/01; D06M15/15; Y; Y10; Y10S; Y10S8/00; Y10S8/17; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
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) | 1950-01-27 | 1950-07-29 | 1951-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-27 | 1954-07-29 | 1955-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-27 | 1958-07-29 | 1959-01-28 | $7700.00 | Window Closed / Lapsed |