US2341907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing acidic constituents from fluids
Assignee: Resinous Products and Chemical Co
•
Filing: 1941-04-09
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Granted: 1944-02-15
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Expires: 1961-04-09
Abstract
No abstract record available.
Inventors
- 👤 Harold C Cheetham
- 👤 Robert J Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/281
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) | 1947-02-14 | 1947-08-16 | 1948-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-14 | 1951-08-16 | 1952-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-14 | 1955-08-16 | 1956-02-15 | $7700.00 | Window Closed / Lapsed |