US3053540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus
Assignee: IIT Research Institute
•
Filing: 1959-12-21
•
Granted: 1962-09-11
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Albert P Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:25
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/34; G11B3/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2371166A
Cited
US2127593A
Cited
US2451080A
Cited
US2783048A
Cited
US2857165A
Cited
US2698183A
Cited
US2847223A
Cited
US2953052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |