Patent US3784647A successfully refreshed from Google Patents.
US3784647A
Expired / Lapsed
US
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Curing epoxide resin with boron trichloride-amine complex
Assignee: Novartis AG
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Filing: 1971-08-09
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Granted: 1974-01-08
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Expires: 1991-08-09
Abstract
Abstract CURABLE COMPOSITIONS COMPRISES AN EPOXIDE RESIN AND A COMPLEX OF FORMULA BCL3.NR4R5R6 WHERE R4, R5 AND R6 TOGETHER WITH THE NITROGEN ATOM FORM A HETEROCYCLIC RING, OR R4 AND R5 BOTH REPRESENT METHYL GROUPS AND R6 DENOTES AN ALKYL OR ARALKYL GROUP OF AT LEAST 6 AND AT MOST 18 CARBON ATOMS. PREFFERED COMPOSITIONS CONTAIN COMPLEXES IN WHICH NR4R5R6 DENOTES PYRIDINE, AND THOSE IN WHICH R6 DENOTES AN ALKYL HYDROCARBON GROUP OF 6-18 CARBON ATOMS OR A BENZYL GROUP. THE COMPLEXES ACT AS LATENT HARDNESS.
Inventors
- 👤 G Fleming
- 👤 R Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/72; C08G59/20; C08G59/22; C08G59/30; C08G59/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |