Patent US2852291A successfully refreshed from Google Patents.
US2852291A
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US
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Seals for electric switches
Assignee: Cutler Hammer Inc
•
Filing: 1954-03-29
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Granted: 1958-09-16
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Expires: 1974-03-29
Abstract
No abstract record available.
Inventors
- 👤 Harold W Hults
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; H; H01; H01H; H01H23/00; H01H23/02; H01H23/04; H01H23/06; H02; H02B; H02B1/00; H02B1/015; H02B1/04; H02B1/044; Y; Y10; Y10S; Y10S411/00; Y10S411/915; Y10S411/955; Y10S411/956; Y10S411/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US271365A
Cited
US1189268A
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US1333495A
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US1356873A
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US1364814A
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US2199647A
Cited
US2345515A
Cited
US2462023A
Cited
US2503169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |