US2135271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering olefin oxides from gaseous mixtures and hydrolyzing to form corresponding glycols
Assignee: US Industrial Alcohol Co
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Filing: 1937-07-29
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Granted: 1938-11-01
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Expires: 1957-07-29
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Balcar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:14
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10; C07C29/103; C07C29/106; C12; C12C; C12C11/00; C12C11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-10-31 | 1942-05-02 | 1942-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-31 | 1946-05-02 | 1946-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-31 | 1950-05-02 | 1950-11-01 | $7700.00 | Window Closed / Lapsed |