US2856831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed light beam shutter mechanism
Assignee: Individual
•
Filing: 1953-09-16
•
Granted: 1958-10-21
•
Expires: 1973-09-16
Abstract
No abstract record available.
Inventors
- 👤 Robert C Gipe
- 👤 Paul C Maybury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:47
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US386449A
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US709837A
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US1291964A
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US1444365A
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US1483465A
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US1377366A
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US2354168A
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US2463206A
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US2496880A
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US2577774A
Cited
US2691331A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |