US3336342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing glycidyl ethers of polyhydric phenols
Assignee: Bayer AG
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Filing: 1964-03-17
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Granted: 1967-08-15
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Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
- 👤 Frank Gunter
- 👤 Wegler Richard
- 👤 Schmitz-Josten Robert
- 👤 Kubens Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING A GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES STEPS OF REACTING, AT TEMPERATURES FROM 30 TO 120*C., A MIXTURE CONTAINING A POLYHYDRIC PHENOL, AN EPIHALOHYDRIN AND A SULPHONIUM SALT OF THE FORMULA:
Claim 2
Dependent Claim
37 words
A PROCESS FOR PREPARING A GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES STEPS OF REACTING, AT TEMPERATURES FROM 30 TO 120*C., A MIXTURE CONTAINING A POLYHYDRIC PHENOL, AN EPIHALOHYDRIN AND A SULPHONIUM SALT OF THE FORMULA:
References Cited (Backward Citations)
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US2111260A
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US2309691A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |