US3645959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high molecular weight vinyl polymers
Assignee: Union Carbide Corp
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Filing: 1970-01-05
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Granted: 1972-02-29
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Expires: 1990-01-05
Abstract
Abstract HIGH MOLECULAR WEIGHT, NON-AQUEOUS DISPERSIONS, OF SUCH VINYL POLYMERS AS POLYVINYL ACETATE, POLYVINYL STEARATE, POLYVINYL CHLORIDE, POLYALKYL ACRYLATES, POLYALKYL METHACRYLATES, AND POLYSTYRENE HAVE BENN PREPARED BY COPOLYMERIZING THE RESPECTIVE MONOMER WITH UP TO ABOUT ONE PERCENT OF A DIENE SUCH AS NORBORNADIENE, ETHYLIDENE NORBOURNENE, THE DIELS-ALDER REACTION PRODUCT OF CYCLOPENTADIENE AND NORBORNADIENE, NORBORNADIENE DIMER AND DICYCLOPENTADIENE.
Inventors
- 👤 Louis Anthony Pilato
- 👤 Henry Octave Colomb Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:25
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |