US2909570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of telomers
Assignee: 3M Co
•
Filing: 1954-06-17
•
Granted: 1959-10-20
•
Expires: 1974-06-17
Abstract
No abstract record available.
Inventors
- 👤 Robert H Wade
- 👤 William S Barnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:20
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/395; C07C17/26; C07C17/272; C07C17/278; C07C17/281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR PURIFYING A HALOGEN CONTAINING TELOMER OBTAINED BY THE TELOMERIZATION OF A HALOGENATED OLEFIN IN A META REACTOR IN THE PRESENCE OF A PEROXIDE PROMOTER WHICH COMPRISES CONTACTING SAID TELOMER TOGETHER WITH ASSOCIATED IMPURITIES WITH ACTIVATED ALUMINA
Claim 2
Dependent Claim
39 words
A PROCESS FOR PURIFYING A HALOGEN CONTAINING TELOMER OBTAINED BY THE TELOMERIZATION OF A HALOGENATED OLEFIN IN A META REACTOR IN THE PRESENCE OF A PEROXIDE PROMOTER WHICH COMPRISES CONTACTING SAID TELOMER TOGETHER WITH ASSOCIATED IMPURITIES WITH ACTIVATED ALUMINA
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |