US2090902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing fibrous materials from animal skins
Assignee: Carl Freudenberg KG
•
Filing: 1934-08-31
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Granted: 1937-08-24
•
Expires: 1954-08-31
Abstract
No abstract record available.
Inventors
- 👤 Runkel Roland
- 👤 Lange Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:44
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016; 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) | 1940-08-23 | 1941-02-22 | 1941-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-23 | 1945-02-22 | 1945-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-23 | 1949-02-22 | 1949-08-24 | $7700.00 | Window Closed / Lapsed |