US2540299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recording and reproducing apparatus
Assignee: George W Borg Corp
•
Filing: 1946-08-27
•
Granted: 1951-02-06
•
Expires: 1966-08-27
Abstract
No abstract record available.
Inventors
- 👤 Allen A Shoup
- 👤 Rudolph A Bierwirth
- 👤 Earl L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:51
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; G11B5/027; G11B5/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US789336A
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US1988090A
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US2006052A
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US2118352A
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US2121434A
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US2222173A
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US2303358A
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US2251594A
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US2351005A
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US2439844A
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US2364556A
Cited
US2444676A
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US2414795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |