Patent US3322700A successfully refreshed from Google Patents.
US3322700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of foaming a resin composition comprising an epoxy resin, a vapor generating fluid, boron trifluoride catalyst and an ammonium halide
Assignee: Shell USA Inc
•
Filing: 1964-04-22
•
Granted: 1967-05-30
•
Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert T Dowd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:13
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J2363/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN THE METHOD OF PRODUCING FOAMED EPOXY RESIN COMPOSITIONS WHEREIN THERE ARE BLENDED (A) A LIQUID POLYEPOXIDE COMPOSITION COMPRISING (A) A POLYEPOXIDE CAPABLE OF BEING CURED TO A THERMOSET RESIN; AND (B) A VAPOR GENERATING FLUID WHICH IS COMPLETELY SOLUBLE IN SAID COMPOSITION AT AMBIENT TEMPERATURES AND ATMOSPHERIC PRESSURE BUT VOLATILIZES THEREFROM AT ELEVATED TEMPERATURES; AND (B) A LIQUID CURING COMPOSITION COMPRISING A CURING AGENT SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE AND COORDINATION COMPLEXES OF BORON TRIFLUORIDE; THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE TIME INTERVAL BETWEEN BLENDING OF SAID LIQUID COMPOSITIONS AND FOAM RISE BY INCORPORATING IN SAID CURRING COMPOSITION, PRIOR TO SAID BLENDING STEP, AN AMOUNT OF AN AMMONIUM HALIDE IN THE RANGE FROM 10 TO 150 PERCENT BY WEIGHT, BASED ON BORON TRIFLUORIDE.
Claim 2
Dependent Claim
127 words
IN THE METHOD OF PRODUCING FOAMED EPOXY RESIN COMPOSITIONS WHEREIN THERE ARE BLENDED (A) A LIQUID POLYEPOXIDE COMPOSITION COMPRISING (A) A POLYEPOXIDE CAPABLE OF BEING CURED TO A THERMOSET RESIN; AND (B) A VAPOR GENERATING FLUID WHICH IS COMPLETELY SOLUBLE IN SAID COMPOSITION AT AMBIENT TEMPERATURES AND ATMOSPHERIC PRESSURE BUT VOLATILIZES THEREFROM AT ELEVATED TEMPERATURES; AND (B) A LIQUID CURING COMPOSITION COMPRISING A CURING AGENT SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE AND COORDINATION COMPLEXES OF BORON TRIFLUORIDE; THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE TIME INTERVAL BETWEEN BLENDING OF SAID LIQUID COMPOSITIONS AND FOAM RISE BY INCORPORATING IN SAID CURRING COMPOSITION, PRIOR TO SAID BLENDING STEP, AN AMOUNT OF AN AMMONIUM HALIDE IN THE RANGE FROM 10 TO 150 PERCENT BY WEIGHT, BASED ON BORON TRIFLUORIDE.
References Cited (Backward Citations)
US2451018A
Cited
US2839495A
Cited
US3080341A
Cited
US3051665A
Cited
US3206525A
Cited
US3282863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |