US2102103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering acids
Assignee: CHARLES H LEWIS
•
Filing: 1935-02-16
•
Granted: 1937-12-14
•
Expires: 1955-02-16
Abstract
No abstract record available.
Inventors
- 👤 Oliver M Urbain
- 👤 William R Stemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/47; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/288; C22B3/34; C22B3/38; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1940-12-13 | 1941-06-14 | 1941-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-12-13 | 1945-06-14 | 1945-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-12-13 | 1949-06-14 | 1949-12-14 | $7700.00 | Window Closed / Lapsed |