US2938964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus
Assignee: Associated Engineering & Equip
•
Filing: 1957-03-13
•
Granted: 1960-05-31
•
Expires: 1977-03-13
Abstract
No abstract record available.
Inventors
- 👤 Collett James Daviss
- 👤 Iii Joseph Alfred Walston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR775220A
Cited
US2063799A
Cited
US2291476A
Cited
US2622476A
Cited
US2653190A
Cited
US2677727A
Cited
US2726288A
Cited
US2844217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |