US3054757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane production with imines as catalysts
Assignee: Bayer Corp
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Filing: 1960-02-08
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Granted: 1962-09-18
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Expires: 1980-02-08
Abstract
No abstract record available.
Inventors
- 👤 J W Britain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE PREPARATION OF POLYURETHANES AND PLOYTHIOURETHANES BY A PROCESS WHEREIN AN ORGANIC COMPOUND HAVING REACTIVE HYDROGEN AS DETERMINED BY THE ZERWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ANOUT 500, AN HYDROXYL NUMBER OF NOT MORE THAN ABOUT 225 AND AN ACID NUMBER OF NOT MORE THAN ABOUT 10 AND AN ORGANIC COMPOUND HAVING AT LEAST TWO -NCX GROUPS WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR ARE REACTED TOGETHER, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE REACTION MIXTURE A CATALYTIC AMOUNT OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
93 words
IN THE PREPARATION OF POLYURETHANES AND PLOYTHIOURETHANES BY A PROCESS WHEREIN AN ORGANIC COMPOUND HAVING REACTIVE HYDROGEN AS DETERMINED BY THE ZERWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ANOUT 500, AN HYDROXYL NUMBER OF NOT MORE THAN ABOUT 225 AND AN ACID NUMBER OF NOT MORE THAN ABOUT 10 AND AN ORGANIC COMPOUND HAVING AT LEAST TWO -NCX GROUPS WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR ARE REACTED TOGETHER, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE REACTION MIXTURE A CATALYTIC AMOUNT OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2824857A
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 |