Patent US2650924A successfully refreshed from Google Patents.
Patent US3791119A successfully refreshed from Google Patents.
Patent FR930959A successfully refreshed from Google Patents.
Patent US2921381A successfully refreshed from Google Patents.
US2921381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for drying tanned leather
Assignee: Secoterm S A De C V
•
Filing: 1957-02-05
•
Granted: 1960-01-19
•
Expires: 1977-02-05
Abstract
No abstract record available.
Inventors
- 👤 Philip R Thompson
- 👤 Jaime C R Perecmanas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:27
CPC Classifications
C; C14; C14B; C14B1/00; C14B1/58; F; F26; F26B; F26B3/00; F26B3/18; F26B3/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US148990A
Cited
US1994284A
Cited
US2141377A
Cited
US2102667A
Cited
US2244744A
Cited
US2492253A
Cited
US2674809A
Cited
US2686976A
Cited
FR1072221A
Cited
US2771690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |