US2705903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical shutters
Assignee: Individual
•
Filing: 1949-07-07
•
Granted: 1955-04-12
•
Expires: 1969-07-07
Abstract
No abstract record available.
Inventors
- 👤 Fred R Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0311
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2237565A
Cited
US2420273A
Cited
GB268348A
Cited
US1792752A
Cited
US1926716A
Cited
US2441049A
Cited
US2467325A
Cited
US2616962A
Cited
US2607272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |