US3470357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a printing form and of evaluating data contained therein
Assignee: Individual
•
Filing: 1964-06-05
•
Granted: 1969-09-30
•
Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Ritzerfeld
- 👤 Gerhard Ritzfeld
- 👤 Elvira-Nee-Weiss Ritzerfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:18
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/14; G06K1/12; Y; Y10; Y10S; Y10S101/00; Y10S101/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1795378A
Cited
US2085826A
Cited
US2350893A
Cited
US2788879A
Cited
US2953087A
Cited
US3083637A
Cited
US3238501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |