Patent EP1047198A2 successfully refreshed from Google Patents.
US3264236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
p-tolylene dhsocyanate modified polyester polymer and method of making the same
Assignee: ATK Launch Systems LLC
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Filing: 1959-06-22
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Granted: 1966-08-02
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Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 Anthony F Santaniello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/423; C08G18/4233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF MAKING AN ISOCYANATE-TERMINATED PREPOLYMER WHICH COMPRISES REACTING WITH A MOLAR EXCESS OF DIETHYLENE GLYCOL A POLYBASIC ACID WHICH IS ESSENTIALLY A MIXTURE OF THE DIMER AND TRIMER OF AN UNSATURATED C18 FATTY ACID WHICH IS PREDOMINATELY OLEIC ACID TO FORM A POLYESTER HAVING FREE HYDROXYL TERMINALS, AND THEN REACTING SAID POLYESTER WITH A MOLAR EXCESS OF P-TOLYLENE DIISOCYANAYE TO FORM SAID PREPOLYMER.
Claim 2
Independent Claim
65 words
THE METHOD OF MAKING AN ISOCYANATE-TERMINATED PREPOLYMER WHICH COMPRISES REACTING WITH A MOLAR EXCESS OF DIETHYLENE GLYCOL A POLYBASIC ACID WHICH IS ESSENTIALLY A MIXTURE OF THE DIMER AND TRIMER OF AN UNSATURATED C18 FATTY ACID WHICH IS PREDOMINATELY OLEIC ACID TO FORM A POLYESTER HAVING FREE HYDROXYL TERMINALS, AND THEN REACTING SAID POLYESTER WITH A MOLAR EXCESS OF P-TOLYLENE DIISOCYANAYE TO FORM SAID PREPOLYMER.
References Cited (Backward Citations)
US2905652A
Cited
US2969338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |