Patent US2597804A successfully refreshed from Google Patents.
US2597804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive and control means for sheet feeding rollers in duplicating apparatus
Assignee: FIXTURE HARDWARE CORP
•
Filing: 1947-07-12
•
Granted: 1952-05-20
•
Expires: 1967-07-12
Abstract
No abstract record available.
Inventors
- 👤 Henry P Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:56
CPC Classifications
B; B41; B41L; B41L23/00; B41L23/02; B41L23/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1788782A
Cited
US2105195A
Cited
US2172876A
Cited
US2185188A
Cited
US2231109A
Cited
US2266068A
Cited
US2299974A
Cited
GB580577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |