US3317463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester-isocyanate reaction product
Assignee: Nopco Chemical Co
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Filing: 1963-01-29
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Granted: 1967-05-02
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Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 Schonfeld Edward
- 👤 Charles A Fetscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G18/8067; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4222; C08G18/48; C08G18/487; C08G18/4879
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A PROCESS FOR PROTECTING REACTIVE ISOCYANATE GROUPS COMPRISING THE STPES OF (1) CONTACTING AT A TEMPERATURE OF FROM ABOUT 60 TO ABOUT 110*C., A MATERIAL CONTAINING AT LEAST TWO REACTIVE ISOCYANATE GROUPS WITH (2) AN ESTER OF THE FORMULA.
Claim 2
Dependent Claim
39 words
A PROCESS FOR PROTECTING REACTIVE ISOCYANATE GROUPS COMPRISING THE STPES OF (1) CONTACTING AT A TEMPERATURE OF FROM ABOUT 60 TO ABOUT 110*C., A MATERIAL CONTAINING AT LEAST TWO REACTIVE ISOCYANATE GROUPS WITH (2) AN ESTER OF THE FORMULA.
Claim 3
Dependent Claim
57 words
A PROCESS ACCORDING TO CLAIM 1, WHEREIN SAID MATERIAL CONTAINING AT LEAST TWO REACTIVE ISOCYANATE GROUPS IS A PREPOLYMER, SAID PREPOLYMER BEING PREPARED BY REACTING (A) A POLYESTER, HAVING AT LEAST TWO FREE AND UNREACTED HYDROXYL GROUPS, SAID POLYESTER BEING PREPARED BY REACTING (1) FROM ABOUT 1.1 TO 2.0 MOLES OF AN AROMATIC GLYCOL HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |