US2953549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and recovery of modified rubbery copolymers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-02-01
•
Granted: 1960-09-20
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lambert Merlan Meredith
- 👤 Segura Marnell Albin
- 👤 Hunter Edward Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:39
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF PREPARING A MODIFIED COPOLYMER WHICH COMPRISES REACTING A MINOR PROPORTION OF A MONO-NITROSOBENZENE COMPOUND CONTAINING ONLY HYDROXY GROUPS AND ALKYL GROUPS BUT NOT MORE THAN 2 SAID HYDROXY GROUPS AND 2 SAID ALKYL GROUPS WITH A MAJOR PROPORTION OF A COPOLYMER HAVING AN IODINE NUMBER OF 0.5 TO 50 OF A C4 TO C6 MONOOLEFIN WITH A C4 TO C14 MULTIOLEFIN DISSOLVED IN AN INERT ORGANIC SOLVENT, ADDING 1 VOLUME OF WATER TO ABOUT 1 TO LESS THAN 1.5 VOLUMES OF THE NITROSO MODIFIED COPOLYMER SOLUTION, MIXING THE RESULTING COMBINATION OF WATER AND NITROSO MODIFIED POLYMER SOLUTION, ALLOWING THE MIXTURE TO SETTLE AND SEPARATING THE LAYER OF DISSOLVED COPOLYMER FROM THE WATER.
Claim 2
Independent Claim
115 words
A METHOD OF PREPARING A MODIFIED COPOLYMER WHICH COMPRISES REACTING A MINOR PROPORTION OF A MONO-NITROSOBENZENE COMPOUND CONTAINING ONLY HYDROXY GROUPS AND ALKYL GROUPS BUT NOT MORE THAN 2 SAID HYDROXY GROUPS AND 2 SAID ALKYL GROUPS WITH A MAJOR PROPORTION OF A COPOLYMER HAVING AN IODINE NUMBER OF 0.5 TO 50 OF A C4 TO C6 MONOOLEFIN WITH A C4 TO C14 MULTIOLEFIN DISSOLVED IN AN INERT ORGANIC SOLVENT, ADDING 1 VOLUME OF WATER TO ABOUT 1 TO LESS THAN 1.5 VOLUMES OF THE NITROSO MODIFIED COPOLYMER SOLUTION, MIXING THE RESULTING COMBINATION OF WATER AND NITROSO MODIFIED POLYMER SOLUTION, ALLOWING THE MIXTURE TO SETTLE AND SEPARATING THE LAYER OF DISSOLVED COPOLYMER FROM THE WATER.
References Cited (Backward Citations)
US2035698A
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US2393321A
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US2526504A
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US2690780A
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US2798860A
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US2895937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |