US3230155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pure methanol by thermo-compression distillation
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1961-11-22
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Granted: 1966-01-18
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Schurch Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/28; B01D3/00; B01D3/001; C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB308736A
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DE1114168B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |