US3819747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen sulfide-modified epoxy resins and flexible laminates therefrom
Assignee: Dow Chemical Co
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Filing: 1973-02-23
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Granted: 1974-06-25
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Expires: 1993-02-23
Abstract
Abstract MIXTURES OF THE DIGLYCIDYL ETHERS OF A BISPHENOL SUCH AS BISPHENOL A AND A DIGLYCIDYL ETHER OF AN ALIPHATIC POLYHYDROXYL CONTAINING COMPOUND SUCH AS THE DIGLYCIDYL ETHER OF NEOPENTYL GLYCOL ARE MODIFIED WITH HYDROGEN SULFIDE TO PRODUCE EPOXY RESINS WHICH WHEN CURED WITH AN AMINATED POLYGLYCOL ARE USEFUL IN THE PREPARATION OF FLEXIBLE LAMINATES.
Inventors
- 👤 J Bertram
- 👤 R Whiteside
- 👤 P Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/504; C08G59/14; C08G59/1405; C08G59/1411; C08G59/1416; C08G59/20; C08G59/22; C08G59/226; C08G59/32; C08G59/38
Claims Analysis
Total Claims: 0
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |