Patent DD233303A1 successfully refreshed from Google Patents.
US2587269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cabinet record holder
Assignee: Individual
•
Filing: 1947-08-02
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Granted: 1952-02-26
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Expires: 1967-08-02
Abstract
No abstract record available.
Inventors
- 👤 John A Yerkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:03
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/04; G11B33/0405; G11B33/0433; G11B33/0444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1030534A
Cited
US1366203A
Cited
GB170236A
Cited
US1754435A
Cited
GB454889A
Cited
US2313821A
Cited
US2281845A
Cited
US2363574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |