US3287330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether polymers having unsaturated side chains
Assignee: EIDP Inc
•
Filing: 1958-02-06
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Granted: 1966-11-22
•
Expires: 1978-02-06
Abstract
No abstract record available.
Inventors
- 👤 James G Burt
- 👤 Henry C Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A CURED ELASTOMER OBTAINED BY HEATING A POLYALKYLENEETHER POLYMER TO A TEMPERATURE OF AT LEAST ABOUT 125*C. WITH SULFUR IN THE PRESENCE OF VULCANIZATION ACCELERATORS, SAID POLYMER BEING A MILABLE, SULFUR-CURABLE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 30,000 AND CONSISTING ESSENTIALLY OF THE RECURRING UNITS $G-O$ WHEREIN G IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE RADICAL AND A SUBSTITUTED ALKYLENE RADICAL WHEREIN THE SUBSTITUENTS ARE FREE OF ANY ZEREWITION OFF ACTIVE HYDROGEN ATOMS AND HAVE A MOLECULAR WEIGHT OF NOT GREATER THAN ABOUT 250, WITH THE PROVISIO THAT AT LEAST ABOUT ONE-THIRD OF THE G''S BE TETRAMETHYLENNE RADICALS AND THAT THERE BE AN AVERAGE OF AT LEAST ONE G FOR EVERY 10,000 UNITS OF MOLECULAR WEIGHT OF POLYMER, HAVING A SIDE CHAIN WHICH CONTAINS A NON-AROMATIC, CARBONTO-CARBON UNSATURATED GROUP, SAID SIDE CHAIN HAVING A MOLECULAR WEIGHT OF NOT GREATER THAN ABOUT 250.
Claim 2
Dependent Claim
149 words
A CURED ELASTOMER OBTAINED BY HEATING A POLYALKYLENEETHER POLYMER TO A TEMPERATURE OF AT LEAST ABOUT 125*C. WITH SULFUR IN THE PRESENCE OF VULCANIZATION ACCELERATORS, SAID POLYMER BEING A MILABLE, SULFUR-CURABLE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 30,000 AND CONSISTING ESSENTIALLY OF THE RECURRING UNITS $G-O$ WHEREIN G IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE RADICAL AND A SUBSTITUTED ALKYLENE RADICAL WHEREIN THE SUBSTITUENTS ARE FREE OF ANY ZEREWITION OFF ACTIVE HYDROGEN ATOMS AND HAVE A MOLECULAR WEIGHT OF NOT GREATER THAN ABOUT 250, WITH THE PROVISIO THAT AT LEAST ABOUT ONE-THIRD OF THE G''S BE TETRAMETHYLENNE RADICALS AND THAT THERE BE AN AVERAGE OF AT LEAST ONE G FOR EVERY 10,000 UNITS OF MOLECULAR WEIGHT OF POLYMER, HAVING A SIDE CHAIN WHICH CONTAINS A NON-AROMATIC, CARBONTO-CARBON UNSATURATED GROUP, SAID SIDE CHAIN HAVING A MOLECULAR WEIGHT OF NOT GREATER THAN ABOUT 250.
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |