US2192687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for treating residual sulphuric acid liquors
Assignee: EIDP Inc
•
Filing: 1938-01-03
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Granted: 1940-03-05
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Expires: 1958-01-03
Abstract
No abstract record available.
Inventors
- 👤 Mccleary Ray Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084
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) | 1943-03-05 | 1943-09-04 | 1944-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-05 | 1947-09-04 | 1948-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-05 | 1951-09-04 | 1952-03-05 | $7700.00 | Window Closed / Lapsed |