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Patent US2548042A successfully refreshed from Google Patents.
US2548042A
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Electric semiautomatic door operator
Assignee: Individual
•
Filing: 1947-09-26
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Granted: 1951-04-10
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Expires: 1967-09-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Mosher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:21
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05D; E05D15/00; E05D15/26; E05D15/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362602A
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US924686A
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US990589A
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US1451619A
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US2188393A
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US2238181A
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US2274216A
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US2372303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |