US3592789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polymer solution from aromatic anhydrides and isocyanates
Assignee: Standard Oil Co
•
Filing: 1968-02-07
•
Granted: 1971-07-13
•
Expires: 1988-02-07
Abstract
Abstract THIS INVENTION RELATES TO THE PRODUCTION OF INSULATING AND PROTECTIVE COATINGS FOR ELECTRIC WIRE AND OTHER SURFACES. MORE PARTICULARLY IT RELATES TO THE PREPARATION OF COATING SOLUTIONS WHEREIN AROMATIC ANHYDRIDES AND POLYISOCYANATE ARE DISSOLVED IN A POLAR SOLVENT BOILING ABOVE 300*F. AT A TEMPERATURE OF ABOUT 150* TO 300*F. THE COATING SOLUTION IS THEN COOLED TO ROOM TEMPERATURE AND THE RESULTING SOLUTION IS APPLIED TO METAL SURFACES AND BAKED TO ADHERENT, TOUGH FILMS USEFUL AS ELECTRICAL AND MISSLE COATINGS.
Inventors
- 👤 Benjamin A Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:53
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/34; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1035; C08G73/14; H01B3/302
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |