US3218273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of curing epoxy and polyester resins
Assignee: AT&T Inc
•
Filing: 1962-10-22
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Granted: 1965-11-16
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Montesano Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08F; C08F283/00; C08F283/01; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD FOR CURING A RESIN SELECTED FROM THE GROUP CONSISTING OF EPOXY RESINS CONTAINING AT LEAST TWO TERMINAL 1,2 EPOXY GROUPS PER MOLECULE OF EPOXY RESIN AND POLYESTER RESINS FORMED BY THE CONDENSATION OF A DICARBOXYLIC ACID AND A DIHYDRIC ALCOHOL WHICH COMPRISES THE STEPS OF SUCCESSIVELY (A) ADMIXING THE SAID RESIN WITH A CURING AGENT AND AN ACCELERATOR CONSISTING ESSENTIALLY OF SILICA GEL, HAVING A MAXIMUM RESIDUAL MOISTURE CONTENT OF 5.5 PERCENT BASED ON THE WEIGHT OFD THE SILICA GEL, AND (B) ADDING WATER TO THE RESULTANT MICTURE IN AN AMOUNT WITHIN THE RANGE OF 0.1 TO 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF NON-DILUTE EPOXY RESIN AND WITHIN THE RANGE OF 0.5 TO 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF DILUTE POLYESTER RESIN, WHEREBY THE SAID SILICA GEL ABSORBS THE SAID WATER SO, RESULTING IN THE EVOLUTION OF HEAT, THEREBY ACCELERATING THE CURING REACTION.
Claim 2
Independent Claim
153 words
A METHOD FOR CURING A RESIN SELECTED FROM THE GROUP CONSISTING OF EPOXY RESINS CONTAINING AT LEAST TWO TERMINAL 1,2 EPOXY GROUPS PER MOLECULE OF EPOXY RESIN AND POLYESTER RESINS FORMED BY THE CONDENSATION OF A DICARBOXYLIC ACID AND A DIHYDRIC ALCOHOL WHICH COMPRISES THE STEPS OF SUCCESSIVELY (A) ADMIXING THE SAID RESIN WITH A CURING AGENT AND AN ACCELERATOR CONSISTING ESSENTIALLY OF SILICA GEL, HAVING A MAXIMUM RESIDUAL MOISTURE CONTENT OF 5.5 PERCENT BASED ON THE WEIGHT OFD THE SILICA GEL, AND (B) ADDING WATER TO THE RESULTANT MICTURE IN AN AMOUNT WITHIN THE RANGE OF 0.1 TO 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF NON-DILUTE EPOXY RESIN AND WITHIN THE RANGE OF 0.5 TO 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF DILUTE POLYESTER RESIN, WHEREBY THE SAID SILICA GEL ABSORBS THE SAID WATER SO, RESULTING IN THE EVOLUTION OF HEAT, THEREBY ACCELERATING THE CURING REACTION.
References Cited (Backward Citations)
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US2610959A
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US2739134A
Cited
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Cited
US3072500A
Cited
US3050493A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |