Patent US3326862A successfully refreshed from Google Patents.
US3326862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes prepared from polythioethers free of sulfonium complexes
Assignee: Bayer AG
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Filing: 1965-08-31
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Granted: 1967-06-20
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Expires: 1985-08-31
Abstract
No abstract record available.
Inventors
- 👤 Wagner Kuno
- 👤 Peter Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/52; C08G75/00; C08G75/12; C08L; C08L81/00; C08L81/04; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD FOR MAKING A POLYTHIOETHER POLYURETHANE PLASTIC WHICH COMPRISES (1) MIXING AT A TEMPERTURE OF FROM ABOUT 70*C. TO ABOUT 180*C. A POLYTHIOETHER HAVING SULFONIUM COMPLEXES AND AN ALKYL ACCEPTOR CONTAINING AMMONIA IN THE PRESENCE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER, ALCOHOL, A MERCAPTAN AND MIXTURES THEREOF WHEREBY A POLYTHIOETHER SUBSTANTIALLY FREE FROM SULFONIUM COMPLEXES IS PREPARED, AND (2) REACTING THE RESULTING POLYTHIOETHER WITH AN ORGANIC POLYISOCYANATE TO PREPARE SAID POLYURETHANE PLASTICS.
Claim 2
Independent Claim
77 words
A METHOD FOR MAKING A POLYTHIOETHER POLYURETHANE PLASTIC WHICH COMPRISES (1) MIXING AT A TEMPERTURE OF FROM ABOUT 70*C. TO ABOUT 180*C. A POLYTHIOETHER HAVING SULFONIUM COMPLEXES AND AN ALKYL ACCEPTOR CONTAINING AMMONIA IN THE PRESENCE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER, ALCOHOL, A MERCAPTAN AND MIXTURES THEREOF WHEREBY A POLYTHIOETHER SUBSTANTIALLY FREE FROM SULFONIUM COMPLEXES IS PREPARED, AND (2) REACTING THE RESULTING POLYTHIOETHER WITH AN ORGANIC POLYISOCYANATE TO PREPARE SAID POLYURETHANE PLASTICS.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |