US3440944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the development of photocopying material
Assignee: Keuffel and Esser Co
•
Filing: 1965-02-12
•
Granted: 1969-04-29
•
Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Fritz Endermann
- 👤 Johannes Munder
- 👤 Joachim Stroszynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:45
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2144919A
Cited
US2737100A
Cited
US3233338A
Cited
FR1322930A
Cited
US3203333A
Cited
US3311040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |