Patent US3496240A successfully refreshed from Google Patents.
US3496240A
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Acetylenic carbinol production and recovery by thin film,superatmospheric pressure evaporation with condenser pressure control by venting
Assignee: F Hoffmann La Roche AG
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Filing: 1966-09-20
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Granted: 1970-02-17
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 August Sturzenegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:09
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/36; C07C29/38; C07C29/42; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2519451A
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US2680708A
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US2935451A
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US2925363A
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US3054729A
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US3196087A
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US3186795A
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US3266555A
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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) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |