US3350325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble polymer of diglycidyl ether and an alkanolamine
Assignee: Dow Chemical Co
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Filing: 1964-07-31
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Granted: 1967-10-31
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Ashby
- 👤 Clarence R Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/64; C08G73/00; C08G73/02; C08G73/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OFPRODUCING A WATER SOLUBLE THERMOPLASTIC POLYMER COMPRISING THE REACTION PRODUCT OF APPROXIMATELY EQUAL MOLECULAR QUANTITIES OF DIGLYCIDYL ETHER AND AN ALKANOLAMINE CONTAINING FROM 2 TO 4 CARBON ATOMS, SAID METHOD COMPRISING: ADDING SAID DIGLYDICYL ETHER TO SAID ALKANOLAMINE WHILE MIXING AND MAINTAINING THE REACTION TEMPERATURE OF SAID AMINE AND ETHER MIXTURE BETWEEN ABOUT 25* AND 175*C., THE RATE OF ADDITION BEING APPROXIMATELY EQUAL TO THE RATE OF REACTION BETWEEN SAID AMINE AND ETHER; THEREAFTER COMPLETING THE REACTION OF SAID MIXTURE BY MAINTAINING SAID REACTION TEMPERATURE UNTIL ALL OF THE EPOXIDE GROUPS IN SAID MIXTURE HAVE BEEN REACTED.
Claim 2
Independent Claim
99 words
A METHOD OFPRODUCING A WATER SOLUBLE THERMOPLASTIC POLYMER COMPRISING THE REACTION PRODUCT OF APPROXIMATELY EQUAL MOLECULAR QUANTITIES OF DIGLYCIDYL ETHER AND AN ALKANOLAMINE CONTAINING FROM 2 TO 4 CARBON ATOMS, SAID METHOD COMPRISING: ADDING SAID DIGLYDICYL ETHER TO SAID ALKANOLAMINE WHILE MIXING AND MAINTAINING THE REACTION TEMPERATURE OF SAID AMINE AND ETHER MIXTURE BETWEEN ABOUT 25* AND 175*C., THE RATE OF ADDITION BEING APPROXIMATELY EQUAL TO THE RATE OF REACTION BETWEEN SAID AMINE AND ETHER; THEREAFTER COMPLETING THE REACTION OF SAID MIXTURE BY MAINTAINING SAID REACTION TEMPERATURE UNTIL ALL OF THE EPOXIDE GROUPS IN SAID MIXTURE HAVE BEEN REACTED.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |