US3647773A
Expired / Lapsed
US
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Suspension polymerization in the presence of alpha-methyl styrene
Assignee: Fujifilm Holdings Corp
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Filing: 1969-01-22
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Granted: 1972-03-07
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Expires: 1989-01-22
Abstract
Abstract A PROCESS FOR SUSPENSION POLYMERIZATION OF VINYL COMPOUNDS IN THE PRESENCE OF A-METHYLSTYRENE AND A SLIGHTLY WATER SOLUBLE INORGANIC SALT OR A WATER SOLUBLE HIGH MOLECULAR WEIGHT COMPOUND.
Inventors
- 👤 Keltaro Ohe
- 👤 Daijiro Nishio
- 👤 Shigera Sadamstsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:52
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F257/00; C08F257/02; C08F289/00; C08F292/00; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F212/12; C08F212/14; C08F212/30; C08F218/00; C08F218/02; C08F218/04; C08F218/08; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |