US2757262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker casing with coated arc extinguishing chamber
Assignee: General Electric Co
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Filing: 1955-05-23
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Granted: 1956-07-31
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Wilfred H Yeamans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:43
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/02; H01H73/18; H01H33/00; H01H33/70; H01H33/76; H01H9/00; H01H9/30; H01H9/34; H01H9/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN ELECTRIC CIRCUIT BREAKER COMPRISING A CASING OF INSULATING MATERIAL, CONDUCTOR MEANS WITHIN SAID CASING ADAPTED TO FORM AN ARC IN A PREDETERMINED ARCING AREA WITHIN SAID CASING, A PROTECTIVE COATING ON SAID INSULATED CASING ADJACENT SAID ARCING AREA COMPRISING AN AROMATIC HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYRO-CATECHOL, RESORCINOL, AND HYDROQUINONE.
Claim 2
Dependent Claim
54 words
AN ELECTRIC CIRCUIT BREAKER COMPRISING A CASING OF INSULATING MATERIAL, CONDUCTOR MEANS WITHIN SAID CASING ADAPTED TO FORM AN ARC IN A PREDETERMINED ARCING AREA WITHIN SAID CASING, A PROTECTIVE COATING ON SAID INSULATED CASING ADJACENT SAID ARCING AREA COMPRISING AN AROMATIC HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYRO-CATECHOL, RESORCINOL, AND HYDROQUINONE.
References Cited (Backward Citations)
US2577899A
Cited
US2645693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |