Patent US2997949A successfully refreshed from Google Patents.
US2997949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for printing selected portions of a printing form
Assignee: Individual
•
Filing: 1959-02-18
•
Granted: 1961-08-29
•
Expires: 1979-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:11
CPC Classifications
B; B41; B41L; B41L11/00; B41P; B41P2700/00; B41P2700/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2137096A
Cited
US2237363A
Cited
US2589790A
Cited
US2707433A
Cited
US2724330A
Cited
US2787212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |