Patent US2790992A successfully refreshed from Google Patents.
US2790992A
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Hinge construction
Assignee: WALTER E SCHIRMER
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Filing: 1954-08-11
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Granted: 1957-05-07
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Expires: 1974-08-11
Abstract
No abstract record available.
Inventors
- 👤 Charles E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:11
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/48; E05D15/50; E05D15/505; E05D15/507; E05Y; E05Y2900/00; E05Y2900/30; E05Y2900/31; Y; Y10; Y10S; Y10S292/00; Y10S292/71; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0837; Y10T292/42; Y10T292/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |