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US2639043A
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Assignee: Aurora Equipment Co
•
Filing: 1946-04-17
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Granted: 1953-05-19
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Expires: 1966-04-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:26
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/30; A47B57/48; A47B57/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1871972A
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GB377770A
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US1996518A
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US2000451A
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US1966928A
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US1971726A
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US2246457A
Cited
US2604213A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |