US2721040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Take-up film reel drive
Assignee: RCA Corp
•
Filing: 1950-12-21
•
Granted: 1955-10-18
•
Expires: 1970-12-21
Abstract
No abstract record available.
Inventors
- 👤 Virgil M Grantham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:45
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US365051A
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US1277559A
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US1810690A
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US2174411A
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US2099299A
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US2124938A
Cited
US2267478A
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US2398879A
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US2464135A
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US2623702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |