US2958274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for lithographic duplication of printing forms
Assignee: Individual
•
Filing: 1957-01-18
•
Granted: 1960-11-01
•
Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41L; B41L19/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1627774A
Cited
US2220255A
Cited
US2335954A
Cited
US2296533A
Cited
US2358284A
Cited
US2421823A
Cited
US2425327A
Cited
US2525982A
Cited
US2704028A
Cited
US2813484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |