US2717885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions
Assignee: Celanese Coatings Co
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Filing: 1949-09-20
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Granted: 1955-09-13
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Expires: 1969-09-20
Abstract
No abstract record available.
Inventors
- 👤 Sylvan O Greenlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:06
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
HEAT HARDENING EPOXIDE RESIN COMPOSITIONS CONSISTING ESSENTIALLY OF AN EPOXIDE RESIN RESULTING FROM THE REACTION OF A DIHYDRIC PHENOL WITH EPICHLORHYDRIN IN THE PRESENCE OF CAUTIC ALKALI AND HAVING ADMIXED THEREWITH AS A LATENT CURING CATALYST A SMALL AMOUNT OF AN ADDITION PRODUCT OF BORON TRIFLUORIDE WITH AN AMINE HAVING AT LEAST ONE AMINE NITROGEN ATOM WHICH DOES NOT HAVE DIRECTLY LINKED THERETO A NEGATIVE RADICAL.
Claim 2
Dependent Claim
66 words
HEAT HARDENING EPOXIDE RESIN COMPOSITIONS CONSISTING ESSENTIALLY OF AN EPOXIDE RESIN RESULTING FROM THE REACTION OF A DIHYDRIC PHENOL WITH EPICHLORHYDRIN IN THE PRESENCE OF CAUTIC ALKALI AND HAVING ADMIXED THEREWITH AS A LATENT CURING CATALYST A SMALL AMOUNT OF AN ADDITION PRODUCT OF BORON TRIFLUORIDE WITH AN AMINE HAVING AT LEAST ONE AMINE NITROGEN ATOM WHICH DOES NOT HAVE DIRECTLY LINKED THERETO A NEGATIVE RADICAL.
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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |