Patent US2909494A successfully refreshed from Google Patents.
US2909494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for resinifying polyepoxides and resulting products
Assignee: Shell Development Co
•
Filing: 1955-11-22
•
Granted: 1959-10-20
•
Expires: 1975-11-22
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Parry
- 👤 James E Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/72; C08G59/182; C08G59/184; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A PROCESS FOR RESINIFYING AND CURING A POLYEPOXIDE HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 WHICH COMPRISES MIXING AND REACTING AT A TEMPERATURE OF 15* C. TO 200*C. THE POLYEPOXIDE WITH AT LEAST .8 EQUIVALENT OF AN EPOXY CURING AGENT CONTAINING A PLURALITY OF HYDROGEN ATTACHED TO AMINO NITROGEN AND BEING SELETED FROM THE GROUP SELECTED FROM ALIPHATIC, CYCLOALIPHATIC, AND AROMATIC AMINES, AMINO-CONTAINING SOLUBLE POLYAMIDES OF DICARBOXYLIC ACIDS AND POLYAMINES AND SOLUBLE ADDUCTS OF POLYAMINES AND MONOEPOXIDES HAVING A SINGLE 1,2-EPOXY GROUP AND AN ACTIVATOR FOR THE CURING AGENT COMPRISING .01% TO 10% BY WEIGHT, BASED ON THE COMBINED WEIGHT OF THE POLYEPOXIDE AND EPOXY CURING AGENT, OF AN ADDITON PRODUCT OF BF3 SELECED FROM THE GROUP CONSISTING OF REACTION PRODUCTS OF BF3 A ND AMINES AND REACTION PRODUCTS OF BF3 AND PHENOLS, THE WORD "EQUIVALENT" USED HEREIN REFERRING TO THE AMOUNT OF EPOXY CURING AGENT NEEDED TO FURNISH ONE AMINO HYDROGEN PR EPOXY GROUP OF THE POLYEPOXIDE.
Claim 2
Dependent Claim
158 words
A PROCESS FOR RESINIFYING AND CURING A POLYEPOXIDE HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 WHICH COMPRISES MIXING AND REACTING AT A TEMPERATURE OF 15* C. TO 200*C. THE POLYEPOXIDE WITH AT LEAST .8 EQUIVALENT OF AN EPOXY CURING AGENT CONTAINING A PLURALITY OF HYDROGEN ATTACHED TO AMINO NITROGEN AND BEING SELETED FROM THE GROUP SELECTED FROM ALIPHATIC, CYCLOALIPHATIC, AND AROMATIC AMINES, AMINO-CONTAINING SOLUBLE POLYAMIDES OF DICARBOXYLIC ACIDS AND POLYAMINES AND SOLUBLE ADDUCTS OF POLYAMINES AND MONOEPOXIDES HAVING A SINGLE 1,2-EPOXY GROUP AND AN ACTIVATOR FOR THE CURING AGENT COMPRISING .01% TO 10% BY WEIGHT, BASED ON THE COMBINED WEIGHT OF THE POLYEPOXIDE AND EPOXY CURING AGENT, OF AN ADDITON PRODUCT OF BF3 SELECED FROM THE GROUP CONSISTING OF REACTION PRODUCTS OF BF3 A ND AMINES AND REACTION PRODUCTS OF BF3 AND PHENOLS, THE WORD "EQUIVALENT" USED HEREIN REFERRING TO THE AMOUNT OF EPOXY CURING AGENT NEEDED TO FURNISH ONE AMINO HYDROGEN PR EPOXY GROUP OF THE POLYEPOXIDE.
References Cited (Backward Citations)
US2528932A
Cited
US2717885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |