US2226809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear fluorinated vinyl aromatic hydrocarbons
Assignee: Dow Chemical Co
•
Filing: 1939-08-29
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Granted: 1940-12-31
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Expires: 1959-08-29
Abstract
No abstract record available.
Inventors
- 👤 Robert R Dreisbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:49
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/14; C08F12/16; C08F12/20; C07; C07C; C07C17/00; C07C17/35; C07C25/00; C07C25/24; C07C25/28
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |