US3294753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process utilizing diazabicyclooctane alkylene oxide catalysis
Assignee: Air Products and Chemicals Inc
•
Filing: 1964-06-05
•
Granted: 1966-12-27
•
Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Burton D Beitchman
- 👤 William E Erner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:50
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0237; B01J31/0201; C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/166; C08G18/168; C08G18/18; C08G18/20; C08G18/2045; C08G18/2063; C08G2115/00; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S528/00; Y10S528/905; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE PROCESS OF PREPARING AN ORGANIC POLYMER BY THE POLYMERIZATION OF A PRECURSOR HAVING ITS PRINCIPAL POLYMERIZABLE COMPONENTS SELECTED FROM THE GROUP CONSISTING OF ARYL ISOCYANATES AND MIXTURES OF ARYL ISOCYANATES WITH POLYMERS HAVING PER MOLECULE A PLURALITY OF REACTIVE HYDROXYL GROUPS, THE IMPROVEMENT WHICH CONSISTS OF UTILIZING AS THE CATALYST FOR THE POLYMERIZATION A COMPOSITION CONSISTING ESSENTIALLY OF THE UNREACTED ANHYDROUS COMBINATION OF DIAZABICYCLOOCTANE AND AT LEAST ONE C2-C4 ALKYLENE OXIDE IN WHICH THE MOLE RATIO OF DIAZABICYCLOOCTANE TO ALKYLENE OXIDE IS FROM 100 MOLES OF DIAZABICYCLOOCTANE TO 1 ALKYLENE OXIDE TO 1 MOLE OF DIAZABICYCLOOCTANE PER 20 MOLES OF ALKYLENE OXIDE.
Claim 2
Dependent Claim
104 words
IN THE PROCESS OF PREPARING AN ORGANIC POLYMER BY THE POLYMERIZATION OF A PRECURSOR HAVING ITS PRINCIPAL POLYMERIZABLE COMPONENTS SELECTED FROM THE GROUP CONSISTING OF ARYL ISOCYANATES AND MIXTURES OF ARYL ISOCYANATES WITH POLYMERS HAVING PER MOLECULE A PLURALITY OF REACTIVE HYDROXYL GROUPS, THE IMPROVEMENT WHICH CONSISTS OF UTILIZING AS THE CATALYST FOR THE POLYMERIZATION A COMPOSITION CONSISTING ESSENTIALLY OF THE UNREACTED ANHYDROUS COMBINATION OF DIAZABICYCLOOCTANE AND AT LEAST ONE C2-C4 ALKYLENE OXIDE IN WHICH THE MOLE RATIO OF DIAZABICYCLOOCTANE TO ALKYLENE OXIDE IS FROM 100 MOLES OF DIAZABICYCLOOCTANE TO 1 ALKYLENE OXIDE TO 1 MOLE OF DIAZABICYCLOOCTANE PER 20 MOLES OF ALKYLENE OXIDE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |