US3253000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of liquid epoxides from polydiolefins
Assignee: Huels AG
•
Filing: 1963-05-10
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Granted: 1966-05-24
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Expires: 1983-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kirchhof Werner
- 👤 Stumpf Walter
- 👤 Schleimer Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C07; C07D; C07D303/00; C07D303/02; C07D303/04; C08C; C08C19/00; C08C19/04; C08C19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
AN EPOXYPOLYBUTADIENE POLYMER OF POLYBUTADIENE COMPRISING 70 TO 90% 1,4-CIS-POLYBUTADIENE, 10 TO 30% 1,4-TRANS-POLYBUTADIENE AND LESS THAN 2% 1,2-POLYBUTADIENE HAVING A MOLECULAR WEIGHT 5,000 TO 50,000, SAID EPOXY-POLYBUTADIENE HAVING AN EPOXY OXYTEN CONTENT OF 8.1-10.8% BY WEIGHT OF POLYMER AND A VISCOSITY OF 5,000 TO 28,000 CENTIPOISE AT 25*C.
Claim 2
Dependent Claim
49 words
AN EPOXYPOLYBUTADIENE POLYMER OF POLYBUTADIENE COMPRISING 70 TO 90% 1,4-CIS-POLYBUTADIENE, 10 TO 30% 1,4-TRANS-POLYBUTADIENE AND LESS THAN 2% 1,2-POLYBUTADIENE HAVING A MOLECULAR WEIGHT 5,000 TO 50,000, SAID EPOXY-POLYBUTADIENE HAVING AN EPOXY OXYTEN CONTENT OF 8.1-10.8% BY WEIGHT OF POLYMER AND A VISCOSITY OF 5,000 TO 28,000 CENTIPOISE AT 25*C.
References Cited (Backward Citations)
US2949441A
Cited
US3030336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |