US2663050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record apparatus and method
Assignee: Gray Manufacturing Co Inc
•
Filing: 1951-07-30
•
Granted: 1953-12-22
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Expires: 1971-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles W Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:56
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/66; Y; Y10; Y10S; Y10S264/00; Y10S264/66; Y10S425/00; Y10S425/81
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2340161A
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US2366825A
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US2611927A
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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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |