US2197707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process for its production
Assignee: Solvay Process Co
•
Filing: 1929-12-09
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Granted: 1940-04-16
•
Expires: 1949-12-09
Abstract
No abstract record available.
Inventors
- 👤 Eugene D Crittenden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:43
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/12; C01B3/16; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |