Patent US3984636A successfully refreshed from Google Patents.
Patent US3379624A successfully refreshed from Google Patents.
US3379624A
Expired / Lapsed
US
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Process and equipment for the manufacture of pure polyalcohols
Assignee: Perstorp AB
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Filing: 1964-07-10
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Granted: 1968-04-23
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Expires: 1984-07-10
Abstract
No abstract record available.
Inventors
- 👤 Lindkvist Eirik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:20
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/20; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C35/00; C07C35/02; C07C35/08; C07C35/14; C07C2601/00; C07C2601/12; C07C2601/14
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |