US3537790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative feeder for photographic printer
Assignee: PROGRESSIVE IND CORP
•
Filing: 1968-07-22
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Granted: 1970-11-03
•
Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Harold G Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:41
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6271; G03B27/6285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2621560A
Cited
US2594358A
Cited
US2746549A
Cited
US2754721A
Cited
GB835431A
Cited
US3025758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |