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US2572431A
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Assignee: BEULAH H BATES
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Filing: 1946-03-01
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Granted: 1951-10-23
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Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Walter A Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:26
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/428; F; F16; F16B; F16B2200/00; F16B2200/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1707533A
Cited
US2117519A
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US2175453A
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US2250653A
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US2409966A
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US2403842A
Cited
US2433772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |