US2185928A
Expired / Lapsed
US
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Apparatus for catalytic conversions and other contact mass operations
Assignee: ExxonMobil Oil Corp
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Filing: 1937-09-01
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Granted: 1940-01-02
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Expires: 1957-09-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Simpson
- 👤 John W Payne
- 👤 Jr John A Crowley
- 👤 Clark S Teitsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:53
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/067; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00168; B01J2208/00212; F; F28; F28D; F28D7/00; F28D7/16; F28D7/1615; F28D7/163; F28D7/1669; F28D7/1684; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14
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) | 1943-01-01 | 1943-07-03 | 1944-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-01 | 1947-07-03 | 1948-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-01 | 1951-07-03 | 1952-01-02 | $7700.00 | Window Closed / Lapsed |