US3054759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane production with thorium salts as catalysts
Assignee: Bayer Corp
•
Filing: 1960-03-17
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Granted: 1962-09-18
•
Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 J W Britain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE PREPARTION OF POLYURETHANES AND POLYTHIOURETHANES BY A PROCESS IN WHICH AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS, DETERMINABLE BY THE ZEREWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ABOUT 200, AN -OH NUMBER OF NOT MORE THAN ABOUT 600 AND AN ACID NUMBER OF LESS THAN 10 WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO -NCX GROUPS, WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST CONTAINING A MEMBER SELCETED FROM THE GROUP CONSISTING OF A THORIUM SALT OF A CARBOXYLIC ACID HAVING FROM 1 TO 18 CARBON ATOMS OF A CARBOXYLIC ACID HAVING ORGANIC ACID SOLUTION IN THE REACTION MIXTURE.
Claim 2
Dependent Claim
126 words
IN THE PREPARTION OF POLYURETHANES AND POLYTHIOURETHANES BY A PROCESS IN WHICH AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS, DETERMINABLE BY THE ZEREWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ABOUT 200, AN -OH NUMBER OF NOT MORE THAN ABOUT 600 AND AN ACID NUMBER OF LESS THAN 10 WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO -NCX GROUPS, WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST CONTAINING A MEMBER SELCETED FROM THE GROUP CONSISTING OF A THORIUM SALT OF A CARBOXYLIC ACID HAVING FROM 1 TO 18 CARBON ATOMS OF A CARBOXYLIC ACID HAVING ORGANIC ACID SOLUTION IN THE REACTION MIXTURE.
References Cited (Backward Citations)
US2933462A
Cited
US2990244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |