US2830160A
Expired / Lapsed
US
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Assignee: Engel & Gibbs Ltd
•
Filing: 1954-07-07
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Granted: 1958-04-08
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Expires: 1974-07-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest E O Engel
- 👤 Francis W G Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/20; H01H29/22; G; G01; G01C; G01C19/00; G01C19/02; G01C19/44; G01C9/00; G01C9/18; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/1254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US898766A
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US1144973A
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US1871177A
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US2033372A
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US2232590A
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US2348950A
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US2376377A
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US2626997A
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US2768259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |