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US2581567A
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Assignee: Individual
•
Filing: 1948-12-29
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Granted: 1952-01-08
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Darrell R Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:43
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/08; B29; B29C; B29C45/00; B29C45/14; B29C45/1459; B29C45/14336; B29L; B29L2031/00; B29L2031/736
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779689A
Cited
US1778470A
Cited
US1809907A
Cited
US2132917A
Cited
US2172407A
Cited
FR856480A
Cited
US2281722A
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 |