US3032537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic polymerization of thiocarbonyl difluoride
Assignee: EIDP Inc
•
Filing: 1959-07-16
•
Granted: 1962-05-01
•
Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 Henry C Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN THE PROCESS OF HOMOPOLYMERIZING THIOCARBONYL DIFLUORIDE, THE IMPROVEMENT COMPRISING CONTACTING THE THIOCARBONYL DIFLUORIDE AT A TEMPERATURE OF FROM ABOUT -80*C. TO ABOUT -10*C. IN AN INERT SOLVENT, WHICH IS A LIQUID DURING THE POLYMERIZATION REACTION, WITH FROM ABOUT 0.1 TO 10.0 MOLE PERCENT, BASED ON THE THIOCARBONYL DIFLUORIDE, OF AN ALKOXIDE HAVING THE FORMULA M(OR)N WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF TRIVALENT ALUMINUM AND TETRAVALENT TITANIUM, N IS AN INTEGER HAVING A VALUE EQUAL TO THE VALANCE OF M AND R IS AN ALKYL RADICAL, SAID ALKOXIDE BEING SOLUBLE IN DIETHYL ETHER.
Claim 2
Dependent Claim
96 words
IN THE PROCESS OF HOMOPOLYMERIZING THIOCARBONYL DIFLUORIDE, THE IMPROVEMENT COMPRISING CONTACTING THE THIOCARBONYL DIFLUORIDE AT A TEMPERATURE OF FROM ABOUT -80*C. TO ABOUT -10*C. IN AN INERT SOLVENT, WHICH IS A LIQUID DURING THE POLYMERIZATION REACTION, WITH FROM ABOUT 0.1 TO 10.0 MOLE PERCENT, BASED ON THE THIOCARBONYL DIFLUORIDE, OF AN ALKOXIDE HAVING THE FORMULA M(OR)N WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF TRIVALENT ALUMINUM AND TETRAVALENT TITANIUM, N IS AN INTEGER HAVING A VALUE EQUAL TO THE VALANCE OF M AND R IS AN ALKYL RADICAL, SAID ALKOXIDE BEING SOLUBLE IN DIETHYL ETHER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |