US2244573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making catalysts
Assignee: MW Kellogg Co
•
Filing: 1938-07-18
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Granted: 1941-06-03
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Expires: 1958-07-18
Abstract
No abstract record available.
Inventors
- 👤 Jr George Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/83; B01J37/00; B01J37/02; B01J37/03; B01J37/031; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; C07C2521/00; C07C2521/06; C07C2521/08; C07C2521/10; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/12; C07C2523/70; C07C2523/74; C07C2523/75
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) | 1944-06-02 | 1944-12-02 | 1945-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-02 | 1948-12-02 | 1949-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-02 | 1952-12-02 | 1953-06-03 | $7700.00 | Window Closed / Lapsed |