US3535220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk polymerized,fluidized bed,afterchlorinated polyvinyl chloride
Assignee: Toagosei Co Ltd
•
Filing: 1965-07-28
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Granted: 1970-10-20
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Ryuichi Kato
- 👤 Isao Soematsu
- 👤 Hideo Itabashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2964; Y10T428/2965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |