Patent US2862838A successfully refreshed from Google Patents.
US2862838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus with a thermal and electric insulation coating
Assignee: Cutler Hammer Inc
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Filing: 1953-08-24
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Granted: 1958-12-02
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Guy R Radley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; H01B3/002; H01B3/006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/25; Y10T428/252; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ARTICLE COMPRISING ELECTRICAL APPARATUS HAVING FORMED THEREON A THERMAL AND ELECTRIC INSULATION COATING FOR PROTECTING THE SURFACES OF SAID APPARATUS AGAINST HEAT AND THE FORMATION OF CONTINUOUS DEPOSITS OF ELECTRODE MATERIAL THEREON AS AN INCIDENT TO ELECTRICAL ARCING, WHICH COATING COMPRISES A HARDENED LAYER OF HEAT RESISTANT INSULATING SILICONE RESIN MATERIAL HAVING IRREGULARLY SHAPED RELATIVELY LARGE PARTICLES OF QUARTZ PARTIALLY EMBEDDED THEREIN, SAID PARTICLES BEING CLOSELY SPACED IN STAGGERED RELATIONSHIP TO ONE ANOTHER, AND SUBSTANTIALLY ALL OF SAID PARTICLES EACH HAVING CERTAIN PORTIONS THEREOF EXPOSED AND IN OVERLYING RELATIONSHIP TO CERTAIN OTHER EXPOSED SURFACES THEREOF WITH REFERENCE TO THE DIRECTION OF APPROACH OF THE PARTICLES OF ELECTRODE MATERIAL.
Claim 2
Dependent Claim
109 words
AN ARTICLE COMPRISING ELECTRICAL APPARATUS HAVING FORMED THEREON A THERMAL AND ELECTRIC INSULATION COATING FOR PROTECTING THE SURFACES OF SAID APPARATUS AGAINST HEAT AND THE FORMATION OF CONTINUOUS DEPOSITS OF ELECTRODE MATERIAL THEREON AS AN INCIDENT TO ELECTRICAL ARCING, WHICH COATING COMPRISES A HARDENED LAYER OF HEAT RESISTANT INSULATING SILICONE RESIN MATERIAL HAVING IRREGULARLY SHAPED RELATIVELY LARGE PARTICLES OF QUARTZ PARTIALLY EMBEDDED THEREIN, SAID PARTICLES BEING CLOSELY SPACED IN STAGGERED RELATIONSHIP TO ONE ANOTHER, AND SUBSTANTIALLY ALL OF SAID PARTICLES EACH HAVING CERTAIN PORTIONS THEREOF EXPOSED AND IN OVERLYING RELATIONSHIP TO CERTAIN OTHER EXPOSED SURFACES THEREOF WITH REFERENCE TO THE DIRECTION OF APPROACH OF THE PARTICLES OF ELECTRODE MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |