US2934998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection screen
Assignee: Individual
•
Filing: 1953-05-12
•
Granted: 1960-05-03
•
Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Beard Ernest Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:57
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1293380A
Cited
US1370885A
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US2176154A
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US2279555A
Cited
US2408496A
Cited
US2412435A
Cited
US2424835A
Cited
US2510344A
Cited
US2450237A
Cited
US2508058A
Cited
US2588373A
Cited
US2780136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |