Patent US3317480A successfully refreshed from Google Patents.
US3317480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adducts of isocyanates and aromatic anhydride carboxylic acids
Assignee: Nopco Chemical Co
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Filing: 1963-06-07
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Granted: 1967-05-02
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Charles A Fetscher
- 👤 Schonfeld Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/34; C08G18/343; C08G18/345; C08G18/08; C08G18/10; C08L; C08L63/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
A METHOD OF PREPARING AROMATIC AMIDE ANHYDRIDES COMPRISING REACTING, UNDER ANHYDROUS CONDITIONS, (A) AN ORGANIC ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF (1) AN ALIPHATIC MONOISOCYANATE, (2) AN ALIPHATIC POLYISOCYANATE, (3) AN AROMATIC MONOISOCYANATE, (4) AN AROMATIC POLYISOCYANATE, AND (5) A PREPOLYMER WHICH IS THE REACTION PRODUCT OF (A) A COMPOUND HAVING AT LEAST TWO FREE HYDROXYL GROUPS SELECTED FROM THE GROUP CONSISTING OF (I) A POLYOL, WHICH IS A POLHYDRIC ALCOHOL HAVING AT LEAST TWO FREE HYDROXYL GROUPS, (II) A POLYESTER WHICH IS THE REACTION PRODUCT OF A POLYOL WHICH IS A POLYHYDRIC ALCOHOL HAVING AT LEAST TWO FREE HYDROXYL GROUPS AND AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF DIBASIC ACIDS, POLY BASIC ACIDS AND ANHYDRIDES THEREOF, AND (III) A POLYETHER SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE GYCOLS, POLYOXYPROPYLENE GLYCOLS, COPOLYMERS THEREOF, AND POLYOLS WHICH ARE POLYDRIC ALCOHOLS HAVING AT LEAST THREE HYDROXYL GROUPS CONDENSED WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ETHYLENE OXIDE AND PROPYLENE OXIDE, AND (B) A POLYISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC POLYISOCYANATES AND AROMATIC POLYISOCYANTES IN SUFFICIENT AMOUNTS TO PROVIDE AT LEAST TWO ISOCYANATE GROUPS PER EACH FREE HYDROXYL GROUP PRESENT IN SAID COMPOUND SO THAT ALL OF THE HYDROXYL GROUPS IN SAID COMPOUND ARE REACTED WITH ISOCYANATE GROUPS AND THE SOLE REACTIVE GROUPS PRESENT IN SAID PREPOLYMER BEING REACTIVE ISOCYANATE GROUPS, AND (B) WITH FROM ABOUT 0.9 TO 1.2 MOLES PER REACTIVE ISOCYANATE GROUP CONTAINED WITHINT SAID ISOCYANATE, OF AN AROMATIC ANHYDRIDE OF THE FORMULA
Claim 2
Independent Claim
250 words
A METHOD OF PREPARING AROMATIC AMIDE ANHYDRIDES COMPRISING REACTING, UNDER ANHYDROUS CONDITIONS, (A) AN ORGANIC ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF (1) AN ALIPHATIC MONOISOCYANATE, (2) AN ALIPHATIC POLYISOCYANATE, (3) AN AROMATIC MONOISOCYANATE, (4) AN AROMATIC POLYISOCYANATE, AND (5) A PREPOLYMER WHICH IS THE REACTION PRODUCT OF (A) A COMPOUND HAVING AT LEAST TWO FREE HYDROXYL GROUPS SELECTED FROM THE GROUP CONSISTING OF (I) A POLYOL, WHICH IS A POLHYDRIC ALCOHOL HAVING AT LEAST TWO FREE HYDROXYL GROUPS, (II) A POLYESTER WHICH IS THE REACTION PRODUCT OF A POLYOL WHICH IS A POLYHYDRIC ALCOHOL HAVING AT LEAST TWO FREE HYDROXYL GROUPS AND AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF DIBASIC ACIDS, POLY BASIC ACIDS AND ANHYDRIDES THEREOF, AND (III) A POLYETHER SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE GYCOLS, POLYOXYPROPYLENE GLYCOLS, COPOLYMERS THEREOF, AND POLYOLS WHICH ARE POLYDRIC ALCOHOLS HAVING AT LEAST THREE HYDROXYL GROUPS CONDENSED WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ETHYLENE OXIDE AND PROPYLENE OXIDE, AND (B) A POLYISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC POLYISOCYANATES AND AROMATIC POLYISOCYANTES IN SUFFICIENT AMOUNTS TO PROVIDE AT LEAST TWO ISOCYANATE GROUPS PER EACH FREE HYDROXYL GROUP PRESENT IN SAID COMPOUND SO THAT ALL OF THE HYDROXYL GROUPS IN SAID COMPOUND ARE REACTED WITH ISOCYANATE GROUPS AND THE SOLE REACTIVE GROUPS PRESENT IN SAID PREPOLYMER BEING REACTIVE ISOCYANATE GROUPS, AND (B) WITH FROM ABOUT 0.9 TO 1.2 MOLES PER REACTIVE ISOCYANATE GROUP CONTAINED WITHINT SAID ISOCYANATE, OF AN AROMATIC ANHYDRIDE OF THE FORMULA
Claim 3
Dependent Claim
10 words
A NEW AND NOVEL AROMATIC AMIDE ANHYDRIDE HAVING THE FORMULA:
Claim 4
Dependent Claim
10 words
A NEW AND NOVEL AROMATIC AMIDE ANHYDRIDE HAVING THE FORMULA:
References Cited (Backward Citations)
US3140299A
Cited
US3182073A
Cited
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 |