Patent US3493531A successfully refreshed from Google Patents.
US3493531A
Expired / Lapsed
US
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Rigid crack resistant resinous casting composition
Assignee: Westinghouse Electric Corp
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Filing: 1968-02-23
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Granted: 1970-02-03
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Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 Charles F Hofmann
- 👤 Newton C Foster
- 👤 Anthony J Palumbo
- 👤 James H Mcwhirter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948930A
Cited
US3310520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |