Patent EP0188054A2 successfully refreshed from Google Patents.
US2901467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane coating compositions
Assignee: EIDP Inc
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Filing: 1956-04-20
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Granted: 1959-08-25
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Expires: 1976-04-20
Abstract
No abstract record available.
Inventors
- 👤 Carlton W Croco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08G18/08; C08G18/10; C08G18/12; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A STABLE, CURABLE POLYURETHANE COATING COMPOSITION OBTAINED BY HEATING TO A TEMPERATURE OF ABOUT 50 TO 120* C IN AN INERT SOLVENT (A) 1.0 MOLAR PROPORTION OF A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF FROM ABOUT 400 TO 2,000, (B) 0 TO 1.0 MOLAR PROPORTION OF AN ALIPHATIC DIOL HAVING 2 TO 8 CARBON ATOMS, (C) 1.0 TO 4.0 MOLAR PROPORTIONS OF AN ALIPHATIC TRIOL HAVING FROM 3 TO 6 CARBON ATOMS, AND (D) 4.0 TO 11.0 MOLAR PROPORTIONS OF AN ORGANIC DISOCYANATE, UNTIL SUBSTANTIALLY ALL OF THE HYDROXYL GROUPS HAVE BEEN REACTED WITH ISOCYANATE GROUPS; WITH THE PROVISO THAT AT LEAST 25% BY WEIGHT OF THE COMPOSITION BE THE RADICALS OBTAINED NY REMOVING THE TERMINAL HYDROGEN FROM THE POLYTETRAMETHYLENE ETHER GLYCOL AND THAT THE MOLAR PROPORTION OF ORGANIC DISOCYANATE WHICH IS USED IS SUCH THAT THE NUMBER OF ISOCYANATE GROUPS IS AT LEAST 3 GREATER THAN BUT LESS THAN TWICE THE SUM OF ALL THE HYDROXYL GROUPS INTRODUCED INTO THE REACTION.
Claim 2
Dependent Claim
164 words
A STABLE, CURABLE POLYURETHANE COATING COMPOSITION OBTAINED BY HEATING TO A TEMPERATURE OF ABOUT 50 TO 120* C IN AN INERT SOLVENT (A) 1.0 MOLAR PROPORTION OF A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF FROM ABOUT 400 TO 2,000, (B) 0 TO 1.0 MOLAR PROPORTION OF AN ALIPHATIC DIOL HAVING 2 TO 8 CARBON ATOMS, (C) 1.0 TO 4.0 MOLAR PROPORTIONS OF AN ALIPHATIC TRIOL HAVING FROM 3 TO 6 CARBON ATOMS, AND (D) 4.0 TO 11.0 MOLAR PROPORTIONS OF AN ORGANIC DISOCYANATE, UNTIL SUBSTANTIALLY ALL OF THE HYDROXYL GROUPS HAVE BEEN REACTED WITH ISOCYANATE GROUPS; WITH THE PROVISO THAT AT LEAST 25% BY WEIGHT OF THE COMPOSITION BE THE RADICALS OBTAINED NY REMOVING THE TERMINAL HYDROGEN FROM THE POLYTETRAMETHYLENE ETHER GLYCOL AND THAT THE MOLAR PROPORTION OF ORGANIC DISOCYANATE WHICH IS USED IS SUCH THAT THE NUMBER OF ISOCYANATE GROUPS IS AT LEAST 3 GREATER THAN BUT LESS THAN TWICE THE SUM OF ALL THE HYDROXYL GROUPS INTRODUCED INTO THE REACTION.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |