US3159595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blending crystalline 2, 2-bis(2, 3-epoxypropoxyphenyl) propane with curing agent
Assignee: Shell USA Inc
•
Filing: 1960-08-11
•
Granted: 1964-12-01
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Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:34
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4223; C09; C09J; C09J163/00; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PRODUCING A FREE-FLOWING RESINIFIABLE COMPOSITION WHICH COMPRISES ADMIXING DRY INGREDIENTS INCLUDING FREE-FLOWING CRYSTALS OF 2,2-BIS(2,3-EPOXYPROPOXYPHENYL) PROPANE AND TRIMELLITIC ANHYDRIDE IN AMOUNTS SUCH THAT THE RATIO OF ANHYDRIDE GROUPS TO EPOXY GROUPS IS FROM 0:.85:1 TO 1.15:1 WITH A SUFFICIENT AMOUNT OF A PARAFFIN HAVING FROM 5 TO 9 CARBON ATOMS TO CONVERT THE TOTAL MIXTURE INTO A PASTY SUSPENSION, THOROUGHLY BLENDING SAID PASTY SUSPENSION BY MECHANICAL AGITATION, SUBSEQUENTLY EVAPORATING THE PARAFFIN AT A TEMPERATURE BELOW 100*F. AND STORING THE RESULTING SOLID BLEND AT A TEMPERATURE BELOW ABOUT 100*F.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PRODUCING A FREE-FLOWING RESINIFIABLE COMPOSITION WHICH COMPRISES ADMIXING DRY INGREDIENTS INCLUDING FREE-FLOWING CRYSTALS OF 2,2-BIS(2,3-EPOXYPROPOXYPHENYL) PROPANE AND TRIMELLITIC ANHYDRIDE IN AMOUNTS SUCH THAT THE RATIO OF ANHYDRIDE GROUPS TO EPOXY GROUPS IS FROM 0:.85:1 TO 1.15:1 WITH A SUFFICIENT AMOUNT OF A PARAFFIN HAVING FROM 5 TO 9 CARBON ATOMS TO CONVERT THE TOTAL MIXTURE INTO A PASTY SUSPENSION, THOROUGHLY BLENDING SAID PASTY SUSPENSION BY MECHANICAL AGITATION, SUBSEQUENTLY EVAPORATING THE PARAFFIN AT A TEMPERATURE BELOW 100*F. AND STORING THE RESULTING SOLID BLEND AT A TEMPERATURE BELOW ABOUT 100*F.
References Cited (Backward Citations)
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |