Patent US2521912A successfully refreshed from Google Patents.
US2521912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol aldehyde polyepoxide compositions and reaction products
Assignee: Celanese Coatings Co
•
Filing: 1946-03-08
•
Granted: 1950-09-12
•
Expires: 1966-03-08
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:01
CPC Classifications
C; C08; C08G; C08G81/00; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF PRODUCING COMPOSITIONS AND PRODUCTS WHICH COMPRISES REACTING, IN THE PRESENCE OF A SUBSTANTIAL AMOUNT OF AN ALKALINE CATALYST SUBSTANCE PROPORTIONS OF PHENOL ALDEHYDC CONDENSATES CONTAINING REACTIVE HYDROXYL GROUPS AND LIQUID POLYEPOXIDES FREE FROM FUNCTIONAL GROUPS OTHER THAN EPOXY AND HYDROXYL GROUPS, THE PROPORTIONS OF PHENOL ALDEHYDE CONDENSATE AND POLYEPOXIDE BEING SUCH THAT THE RATIOS OF EPOXIDE GROUPS OF THE POLEPOXIDE TO PHENOLIC HYDROXYLS OF THE PHENOL ALDEHYDE CONDENSATE ARE BETWEEN ABOUT 1.8 TO 1 AND 1 TO 1.4.
Claim 2
Independent Claim
81 words
THE METHOD OF PRODUCING COMPOSITIONS AND PRODUCTS WHICH COMPRISES REACTING, IN THE PRESENCE OF A SUBSTANTIAL AMOUNT OF AN ALKALINE CATALYST SUBSTANCE PROPORTIONS OF PHENOL ALDEHYDC CONDENSATES CONTAINING REACTIVE HYDROXYL GROUPS AND LIQUID POLYEPOXIDES FREE FROM FUNCTIONAL GROUPS OTHER THAN EPOXY AND HYDROXYL GROUPS, THE PROPORTIONS OF PHENOL ALDEHYDE CONDENSATE AND POLYEPOXIDE BEING SUCH THAT THE RATIOS OF EPOXIDE GROUPS OF THE POLEPOXIDE TO PHENOLIC HYDROXYLS OF THE PHENOL ALDEHYDE CONDENSATE ARE BETWEEN ABOUT 1.8 TO 1 AND 1 TO 1.4.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |