Patent US2920253A successfully refreshed from Google Patents.
US2920253A
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Assignee: Engineered Products Co
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Filing: 1956-03-06
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Granted: 1960-01-05
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Hayes O Scott
- 👤 Jr Sidney A Wharram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:41
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/16; Y; Y10; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB607148A
Cited
US2489154A
Cited
US2627423A
Cited
US2609221A
Cited
DE814855C
Cited
US2698917A
Cited
US2694592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |