US2337628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing catalytic material
Assignee: Phillips Petroleum Co
•
Filing: 1941-02-21
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Granted: 1943-12-28
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Expires: 1961-02-21
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 John C Hillyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/066; B01J21/02; B01J21/04; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
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) | 1946-12-27 | 1947-06-28 | 1947-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-12-27 | 1951-06-28 | 1951-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-12-27 | 1955-06-28 | 1955-12-28 | $7700.00 | Window Closed / Lapsed |