US3739042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymers of anionically polymerized and free radical polymerized monomers
Assignee: Standard Oil Co
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Filing: 1969-10-06
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Granted: 1973-06-12
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Expires: 1989-10-06
Abstract
Abstract BLOCK COPOLYMERS ARE POVIDED HAVING AT LEAST TWO BLOCKS, THE FIRST SUCH BLOCKS BEING A HOMOPOLYMER OR COPOLYMER OF A HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALPHA-OLEFINS HAVING UP TO 18 CARBON ATOMS AND DIOLEFINS AND AT LEAST ONE OF THE OTHER BLOCKS BEING A HOMOPOLYMER OR COPOLYMER OBTAINED FROM AT LEAST ONE OTHER MONOMER SUCH AS ACRYLIC AND METHACRYLIC ESTERS, AMIDES, AND NITRILES, VINYL HALIDES VINYLIDENE HALIDES, VINYL ETHERS AND ESTERS, VINYLPYRIDINES AND ALKYLVINYLPYRIDINES, N-VINYL LACTAMS, STYRENES AND ALKYL STYRENES AND MIXTURES THEREOF.
Inventors
- 👤 Nan S Chu
- 👤 James Louis Jezl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
C; C08; C08F; C08F295/00; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |