US2210316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reacting olefins with sulphuric acid
Assignee: Dow Chemical Co
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Filing: 1937-07-06
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Granted: 1940-08-06
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Expires: 1957-07-06
Abstract
No abstract record available.
Inventors
- 👤 Robert R Dreisbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171; C07C303/00; C07C303/24
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) | 1943-08-06 | 1944-02-05 | 1944-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-06 | 1948-02-05 | 1948-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-06 | 1952-02-05 | 1952-08-06 | $7700.00 | Window Closed / Lapsed |