Patent US2575733A successfully refreshed from Google Patents.
US2575733A
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Flexible mica compositions
Assignee: Westinghouse Electric Corp
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Filing: 1946-12-07
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Granted: 1951-11-20
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Expires: 1966-12-07
Abstract
No abstract record available.
Inventors
- 👤 Earl L Schulman
- 👤 George S Reeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; C; C04; C04B; C04B26/00; C04B26/02; C04B26/22; C09; C09J; C09J195/00; C04B2111/00; C04B2111/00474; C04B2111/00612; C08; C08L; C08L2666/00; C08L2666/54; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
INSULTATING MATERIAL COMPRISING IN COMBINATION MICA FLAKES AND A BONDING AGENT APPLIED TO THE MICA FLAKES, THE BONDING AGENT COMPRISING HEAT-TREATED PINE TAR OF A VISCOSITY OF FROM 10 TO 100 POISES FREE FROM OIL AND OTHER VOLATILE MATERIAL CORRESPONDING TO THE PRODUCT DERIVED BY HEATING PINE TAR FOR FROM ABOUT 3 TO 8 HOURS AT A TEMPERATURE OF FROM ABOUT 200* TO 250* C. UNDER ATMOSPHERIC PRESSURE, THE HEAT TREATMENT DRIVING OFF THE OIL AND OTHER VOLATILES IN THE PINE TAR.
Claim 2
Dependent Claim
82 words
INSULTATING MATERIAL COMPRISING IN COMBINATION MICA FLAKES AND A BONDING AGENT APPLIED TO THE MICA FLAKES, THE BONDING AGENT COMPRISING HEAT-TREATED PINE TAR OF A VISCOSITY OF FROM 10 TO 100 POISES FREE FROM OIL AND OTHER VOLATILE MATERIAL CORRESPONDING TO THE PRODUCT DERIVED BY HEATING PINE TAR FOR FROM ABOUT 3 TO 8 HOURS AT A TEMPERATURE OF FROM ABOUT 200* TO 250* C. UNDER ATMOSPHERIC PRESSURE, THE HEAT TREATMENT DRIVING OFF THE OIL AND OTHER VOLATILES IN THE PINE TAR.
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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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |