US2310907A
Expired / Lapsed
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Catalytic conversion apparatus
Assignee: Shell Development Co
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Filing: 1941-10-06
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Granted: 1943-02-09
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Expires: 1961-10-06
Abstract
No abstract record available.
Inventors
- 👤 Frank M Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:12
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/067; B01J8/04; B01J8/0446; B01J8/0449; B01J8/0453; B01J8/0457; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/271; C07C5/2718; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00477; B01J2208/00495; B01J2208/00796; B01J2208/00805; B01J2208/00814; B01J2208/02; B01J2208/023; B01J2208/024; B01J2208/025; B01J2219/00; B01J2219/00002; B01J2219/00018; B01J2219/0002
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) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |