Patent US3265758A successfully refreshed from Google Patents.
US3265758A
Expired / Lapsed
US
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Low molecular weight polymers
Assignee: Richardson Co
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Filing: 1963-03-06
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Granted: 1966-08-09
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Edward A Hedman
- 👤 Curtis W Ogren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:37
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/10; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS OF PREPARING A LOW MOLECULAR WEIGHT POLYBUTADIENE WHICH COMPRISES SUBJECTING BUTADIENE IN THE PRESENCE OF A XYLENE TO THE ACTION OF A CATSLYST COMPLEX CONSISTING ESSENTIALLY OF A SODIUM ISOPROPOXIDE, XYLYLSODIUM AND SODIUM CHLORIDE.
Claim 2
Dependent Claim
36 words
A PROCESS OF PREPARING A LOW MOLECULAR WEIGHT POLYBUTADIENE WHICH COMPRISES SUBJECTING BUTADIENE IN THE PRESENCE OF A XYLENE TO THE ACTION OF A CATSLYST COMPLEX CONSISTING ESSENTIALLY OF A SODIUM ISOPROPOXIDE, XYLYLSODIUM AND SODIUM CHLORIDE.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |