Patent US2637445A successfully refreshed from Google Patents.
US2637445A
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US
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Assignee: Individual
•
Filing: 1952-01-25
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Granted: 1953-05-05
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Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:06
CPC Classifications
A; A47; A47F; A47F7/00; A47F7/28; A47F7/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US208568A
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US717247A
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US1114023A
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US1760309A
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US2066623A
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US2120610A
Cited
US2319872A
Cited
US2470054A
Cited
US2444776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |