US3700633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively hydrogenated block copolymers
Assignee: MILTON M WALA
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Filing: 1971-05-05
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Granted: 1972-10-24
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Expires: 1991-05-05
Abstract
Abstract BLOCK COPOLYMERS HAVING LOW MELT VISCOSITY AND IMPROVED PROCESSABILITY COMPRISE SELECTIVELY HYDROGENATED BLOCK COPOLYMERS COMPRISING A AND B, NON-ELASTOMERIC BLOCK A BEING SUBSTANTIALLY NON-HYDROGENATED HOMOPOLYMER BLOCKS OF MONO ALPHA ALKENYL ARENES AND ELASTOMERIC BLOCKS B BEING RANDOM COPOLYMER BLOCKS OF MONO ALPHA ALKENYL ARENES AND CONJUGATED DIENES WHEREIN AT LEAST 90% OF THE ALIPHATIC DOUBLE BONDS ARE HYDROGENATED.
Inventors
- 👤 Milton M Wald
- 👤 Myron G Quam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |