US2552018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic spring operated shutter and flash lamp synchronizer
Assignee: Kalart Co Inc
•
Filing: 1946-03-22
•
Granted: 1951-05-08
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Hyman
- 👤 Castedello William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:15
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2238115A
Cited
US2322067A
Cited
US2263046A
Cited
US2299497A
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US2321945A
Cited
US2427969A
Cited
US2474378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |