US2359759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification and production of olefins
Assignee: Dow Chemical Co
•
Filing: 1939-04-22
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Granted: 1944-10-10
•
Expires: 1959-04-22
Abstract
No abstract record available.
Inventors
- 👤 George M Hebbard
- 👤 Hunt Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:05
CPC Classifications
C; C10; C10G; C10G70/00; C10G70/02; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C5/09; C07C7/00; C07C7/148; C07C7/163; C07C7/167; C10G45/00; C10G45/32; C10G45/34; C10G45/36
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) | 1947-10-10 | 1948-04-10 | 1948-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-10-10 | 1952-04-10 | 1952-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-10-10 | 1956-04-10 | 1956-10-10 | $7700.00 | Window Closed / Lapsed |