Patent US2638771A successfully refreshed from Google Patents.
US2638771A
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Assignee: Engineered Products Co
•
Filing: 1949-12-14
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Granted: 1953-05-19
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Expires: 1969-12-14
Abstract
No abstract record available.
Inventors
- 👤 Charles S Comey
- 👤 Millard F Saxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:57
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5226; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/80; Y10T70/8432; Y10T70/8459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1050631A
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US1286026A
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US1839265A
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US2083796A
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US2554438A
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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 |