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US2563105A
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Assignee: LOUIS R DUMAN
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Filing: 1948-02-25
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Granted: 1951-08-07
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Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Epstein Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/26; H01F27/263; H01F27/33; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44906; Y10T24/44915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423059A
Cited
US1690154A
Cited
US1771297A
Cited
US2100551A
Cited
US2431950A
Cited
US2425622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |