Patent US2581864A successfully refreshed from Google Patents.
US2581864A
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US
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Assignee: Individual
•
Filing: 1950-11-28
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Granted: 1952-01-08
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Expires: 1970-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfred M Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:22
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/14; A43B7/1405; A43B7/1415; A43B7/142; A43B17/00; A43B17/16; A43B7/1495; A43B7/18; Y; Y10; Y10S; Y10S36/00; Y10S36/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304836A
Cited
US1701804A
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US2213770A
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US2247114A
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US2401514A
Cited
US2366323A
Cited
US2409960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |