US2959619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for oxygenating polymers of butadiene
Assignee: Phillips Petroleum Co
•
Filing: 1956-09-04
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Granted: 1960-11-08
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Expires: 1976-09-04
Abstract
No abstract record available.
Inventors
- 👤 William M Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:47
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS OF PREPARING POLYMERS OF BUTADIENE CONTAINING UP TO 15 PERCENT OXYGEN BY WEIGHT, SAID OXYGEN BEING PRESENT IN THE FORM OF CARBONYLIC OXYGEN AND HYDROXYL OXYGEN, COMPRISING MIXING A LIQUID POLYMER OF BUTADIENE WITH A SOLVENT, CONTACTING SAID MIXTURE WITH A FREE OXYGEN CONTAINING GAS AT A TEMPERATURE IN THE RANGE OF 125* TO 375*F., STOPPING THE FLOW OF SAID OXYGEN CONTAINING GAS, MAINTAINING SAID ELEVATED TEMPERATURE FOR A PERIOD OF TIME TO DECOMPOSE PEROXIDIC GROUPS, AND RECOVERING AN OXIDIZED POLYMER OF BUTADIENE.
Claim 2
Dependent Claim
85 words
A PROCESS OF PREPARING POLYMERS OF BUTADIENE CONTAINING UP TO 15 PERCENT OXYGEN BY WEIGHT, SAID OXYGEN BEING PRESENT IN THE FORM OF CARBONYLIC OXYGEN AND HYDROXYL OXYGEN, COMPRISING MIXING A LIQUID POLYMER OF BUTADIENE WITH A SOLVENT, CONTACTING SAID MIXTURE WITH A FREE OXYGEN CONTAINING GAS AT A TEMPERATURE IN THE RANGE OF 125* TO 375*F., STOPPING THE FLOW OF SAID OXYGEN CONTAINING GAS, MAINTAINING SAID ELEVATED TEMPERATURE FOR A PERIOD OF TIME TO DECOMPOSE PEROXIDIC GROUPS, AND RECOVERING AN OXIDIZED POLYMER OF BUTADIENE.
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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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |