US2802290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape index
Assignee: Individual
•
Filing: 1954-12-20
•
Granted: 1957-08-13
•
Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Walter E Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:06
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/037
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1489147A
Cited
US1475958A
Cited
US1564964A
Cited
US1688824A
Cited
US1804453A
Cited
US1776470A
Cited
GB364022A
Cited
US1867997A
Cited
US2202925A
Cited
US2316815A
Cited
US2563350A
Cited
FR971596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |