US2688490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record stacking means
Assignee: Individual
•
Filing: 1950-12-04
•
Granted: 1954-09-07
•
Expires: 1970-12-04
Abstract
No abstract record available.
Inventors
- 👤 George K Schumaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B33/00; G11B33/02; G11B33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US487438A
Cited
US1311450A
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US927379A
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US1568130A
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US1504421A
Cited
US1508239A
Cited
US1973449A
Cited
GB482667A
Cited
US2245133A
Cited
US2530609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |