US3640968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable divinyl acetal copolymers
Assignee: Olin Corp
•
Filing: 1970-02-11
•
Granted: 1972-02-08
•
Expires: 1990-02-11
Abstract
Abstract THIS INVENTION RELATES TO NEW COPOLYMERS OF SELECTED DIVINYL ACETALS AND SELECTED COMONOMERS CONTAING BOTH A VINYL TYPE UNSATURATION AND AN OXIRANE GROUP. THESE COPOLYMERS HAVE HIGH TENSILE STRENGTH, HIGH ELONGATION AND GOOD ADHESIVE PROPERTIES AND HAVE UTILITY AS PRIMERS, ADHESIVE AND COATINGS FOR GLASS, PLASTICS AND METAL.
Inventors
- 👤 Maurice A Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:47
CPC Classifications
C; C08; C08F; C08F20/00
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |