Patent US3434937A successfully refreshed from Google Patents.
US3434937A
Expired / Lapsed
US
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Distillation purification of crude synthetic methanol
Assignee: Honeywell International Inc
•
Filing: 1966-10-06
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Granted: 1969-03-25
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Expires: 1986-10-06
Abstract
No abstract record available.
Inventors
- 👤 George A Elliott
- 👤 Jerome E Akin
- 👤 Rob R Macgregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:01
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/84; Y; Y10; Y10S; Y10S203/00; Y10S203/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2551584A
Cited
US2549290A
Cited
GB660773A
Cited
US2910412A
Cited
US2993840A
Cited
US3011954A
Cited
US3239435A
Cited
GB967884A
Cited
US3282805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |