US2582985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide resins
Assignee: Celanese Coatings Co
•
Filing: 1950-10-07
•
Granted: 1952-01-22
•
Expires: 1970-10-07
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/1472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF MAKING AN EPOXIDE RESIN WHICH COMPRISES INITIALLY ADMIXING APPROXIMATELY 2 MOLECULAR PROPORTIONS OF EPICHLORHYDRIN AND 1 MOLECULAR PROPORTION OF P,P''-DIHYDROXYDIPHENYLDIMETHYL METHANE AND HEATING SUCH MIXTURE WITH THE ADDITION OF AN AMOUNT OF DILUTE CAUSTIC ALKALI SUFFICIENT TO COMBINE WITH THE CHLORINE OF THE EPICHLORHYDRIN, AND CONTINUING SAID HEATING FOR A SUFFICENT TIME TO EFFECT SUBSTANTIALLY COMPLETE REACTION OF THE P,P''-DIHYDROXYDIPHENYLDIMETHYL METHANE TO PRODUCE A RESINOUS PRODUCT HAVING A SOFTENING POINT OF ABOUT 43* C.
Claim 2
Independent Claim
77 words
THE METHOD OF MAKING AN EPOXIDE RESIN WHICH COMPRISES INITIALLY ADMIXING APPROXIMATELY 2 MOLECULAR PROPORTIONS OF EPICHLORHYDRIN AND 1 MOLECULAR PROPORTION OF P,P''-DIHYDROXYDIPHENYLDIMETHYL METHANE AND HEATING SUCH MIXTURE WITH THE ADDITION OF AN AMOUNT OF DILUTE CAUSTIC ALKALI SUFFICIENT TO COMBINE WITH THE CHLORINE OF THE EPICHLORHYDRIN, AND CONTINUING SAID HEATING FOR A SUFFICENT TIME TO EFFECT SUBSTANTIALLY COMPLETE REACTION OF THE P,P''-DIHYDROXYDIPHENYLDIMETHYL METHANE TO PRODUCE A RESINOUS PRODUCT HAVING A SOFTENING POINT OF ABOUT 43* C.
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) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |