Patent US1979819A successfully refreshed from Google Patents.
US1979819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making felt, paper, and the like
Assignee: Patent and Licensing Corp
•
Filing: 1927-11-04
•
Granted: 1934-11-06
•
Expires: 1947-11-04
Abstract
No abstract record available.
Inventors
- 👤 Bernard C Beckman
- 👤 William T Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:14
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-11-05 | 1938-05-07 | 1938-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-05 | 1942-05-07 | 1942-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-05 | 1946-05-07 | 1946-11-06 | $7700.00 | Window Closed / Lapsed |