Patent US2926013A successfully refreshed from Google Patents.
US2926013A
Expired / Lapsed
US
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Device for operating a door, gate valve or similar closing means
Assignee: Bronswerk NV
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Filing: 1953-03-27
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Granted: 1960-02-23
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Dingeman Van Dongen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:18
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1021; Y10T292/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US887530A
Cited
US1938502A
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US1859364A
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US2091388A
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US2190653A
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US2243914A
Cited
US2301950A
Cited
US2586442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |