US3738862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing reinforced laminates in situ with epoxy-polyhydric phenol condensates
Assignee: Shell USA Inc
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Filing: 1971-11-08
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Granted: 1973-06-12
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Expires: 1991-11-08
Abstract
Abstract LAMINATES, PARTICULARLY GLASS REINFORCED ELECTRICAL LAMINATES, ARE PREPARED IN SITU BY IMPREGNATING A GLASS CLOTH WITH A VARNISH COMPRISING (1) AN EPOXY RESIN CONTAINING AN ORGANIC PHOSPHINE OR A PHOSPHONIUM HALIDE, (2) A PHENOL, (3) A SOLVENT, (4) AN EPOXY CURING AGENT, AND OPTIONALLY (5) AN ACCELERATOR.
Inventors
- 👤 J Klarquist
- 👤 P Jones
- 👤 L Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:38
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/68; C08G59/688; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J2363/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |