US2190548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic apparatus
Assignee: RES TRUST Ltd
•
Filing: 1936-07-23
•
Granted: 1940-02-13
•
Expires: 1956-07-23
Abstract
No abstract record available.
Inventors
- 👤 Pleydell-Bouverie Christopher
- 👤 Lucas Owen David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00044; B01J2208/00061; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00389; B01J2208/00407; B01J2208/00477
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) | 1943-02-12 | 1943-08-14 | 1944-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-12 | 1947-08-14 | 1948-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-12 | 1951-08-14 | 1952-02-13 | $7700.00 | Window Closed / Lapsed |