US2129299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of solvents from gases
Assignee: Dow Chemical Co
•
Filing: 1935-03-30
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Granted: 1938-09-06
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Expires: 1955-03-30
Abstract
No abstract record available.
Inventors
- 👤 Francis R Bichowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/77; B01D2251/00; B01D2251/30; B01D2251/302; B01D2257/00; B01D2257/70; B01D2257/704
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) | 1941-09-05 | 1942-03-07 | 1942-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-05 | 1946-03-07 | 1946-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-05 | 1950-03-07 | 1950-09-06 | $7700.00 | Window Closed / Lapsed |