US4153621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycidyl ethers derived from 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl
Assignee: Zeneca Inc
•
Filing: 1977-09-01
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Granted: 1979-05-08
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Expires: 1997-09-01
Abstract
Abstract Glycidyl ethers prepared from the reaction of 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl and halohydrin form upon curing resins having high heat distortion temperatures. The ethers have utility in the manufacture of powder coatings, adhesive compositions, laminates and molding compositions.
Inventors
- 👤 Ludwig A. Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/245; C08G59/40; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
A glycidyl ether comprising the condensation product of a halohydrin and 3,3',5,5'-tetramethyl-4,4'-dihydroxy biphenyl.
Claim 2
Dependent Claim
13 words
A glycidyl ether comprising the condensation product of a halohydrin and 3,3',5,5'-tetramethyl-4,4'-dihydroxy biphenyl.
Claim 3
Dependent Claim
22 words
A glycidyl ether as claimed in claim 1 wherein the ether is a blend of a diglycidyl ether and a monoglycidyl ether.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |