Patent US2897175A successfully refreshed from Google Patents.
US2897175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of epoxy resins
Assignee: Individual
•
Filing: 1955-05-31
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Granted: 1959-07-28
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Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Howe Brian Russell
- 👤 Turner John Harry Wallice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:41
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE PRODUCTION OF AN EPOXY RESIN WHICH COMPRISES BRINGING A NOVALAK RESIN WHICH IS THE CONDENATION PRODUCT OF A MONOHYDRIC PHENOL WITH AN ALDEHLYDE INTO INTIMATE CONTACT WITH AN ETHYLENICALLY UNSATURATED NON-AROMATIC HYDROCARBON WHICH CONTAINS FROM 3 TO 12 CARBON ATOMS AND AN ACIDIC ALKYLATION CATALYST TO PRODUCE A THERMOPLASTIC PRODUCT AND THAN ETHERIFYING SAID THERMOPLASTIC PRODUCT WITH A HALOEPOXYALKANE, SAID HALOEPOXYALKANE HAIVNG THE STRUCTURE
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE PRODUCTION OF AN EPOXY RESIN WHICH COMPRISES BRINGING A NOVALAK RESIN WHICH IS THE CONDENATION PRODUCT OF A MONOHYDRIC PHENOL WITH AN ALDEHLYDE INTO INTIMATE CONTACT WITH AN ETHYLENICALLY UNSATURATED NON-AROMATIC HYDROCARBON WHICH CONTAINS FROM 3 TO 12 CARBON ATOMS AND AN ACIDIC ALKYLATION CATALYST TO PRODUCE A THERMOPLASTIC PRODUCT AND THAN ETHERIFYING SAID THERMOPLASTIC PRODUCT WITH A HALOEPOXYALKANE, SAID HALOEPOXYALKANE HAIVNG THE STRUCTURE
References Cited (Backward Citations)
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Cited
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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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |