USRE21526E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing chemical
Assignee: —
•
Filing: —
•
Granted: 1940-08-06
•
Expires: 1957-08-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:20
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; B01J8/24; B01J8/38; B01J8/382; C01; C01B; C01B32/00; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54; C10B; C10B49/00; C10B49/16; C10B49/20; C10B49/22; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00044; B01J2208/00061; B01J2208/00088; B01J2208/00327; B01J2208/00336; B01J2208/00353; B01J2208/00371; B01J2208/0053
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) | 1943-08-06 | 1944-02-05 | 1944-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-06 | 1948-02-05 | 1948-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-06 | 1952-02-05 | 1952-08-06 | $7700.00 | Window Closed / Lapsed |