US3538270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic program timer
Assignee: Individual
•
Filing: 1967-01-23
•
Granted: 1970-11-03
•
Expires: 1987-01-23
Abstract
No abstract record available.
Inventors
- 👤 Werner W Buechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:17
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2055031A
Cited
US1933693A
Cited
US2123052A
Cited
US2301394A
Cited
US2625222A
Cited
US2695379A
Cited
US3152323A
Cited
US3219769A
Cited
US3227828A
Cited
US3349685A
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 |