US3217043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removing sulfonium complexes from polythioethers
Assignee: Bayer AG
•
Filing: 1960-11-17
•
Granted: 1965-11-09
•
Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 Wagner Kuno
- 👤 Peter Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/52; C08G65/00; C08G65/34; C08G75/0204; C08G75/0245; C08G75/0286; C08G75/029; C08G75/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF REMOVING SULFONIUM COMPLEXES FROM POLYTHIOETHERS WHICH COMPRISES MIXING TOGETHER AT A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 180*C. SAID POLYTHIOETHER AND AN ALKYL ACEPTOR CONTAINING AMMONIA IN THE PRESENCE OF A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF WATER, MONOHYDRIC ALCOHOLS, POLYHYDRIC ALCOHOLS, MERCAPTANS AND MIXTURES THEREOF.
Claim 2
Independent Claim
51 words
A METHOD OF REMOVING SULFONIUM COMPLEXES FROM POLYTHIOETHERS WHICH COMPRISES MIXING TOGETHER AT A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 180*C. SAID POLYTHIOETHER AND AN ALKYL ACEPTOR CONTAINING AMMONIA IN THE PRESENCE OF A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF WATER, MONOHYDRIC ALCOHOLS, POLYHYDRIC ALCOHOLS, MERCAPTANS AND MIXTURES THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |