US3660274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon treating process
Assignee: WR Grace and Co
•
Filing: 1970-02-18
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Granted: 1972-05-02
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Expires: 1990-02-18
Abstract
Abstract A CATALYTIC PROCESS OF UPGRADING HYDROCARBONS WHICH IS CHARACTERIZED BY CONTACTING THE HYDROCARBONS UNDER REACTIVE CONDITIONS WITH A CATALYST HAVING A LOW SURFACE ARA MATRIX.
Inventors
- 👤 James J Blazek
- 👤 Richard W Baker
- 👤 Charles P Wilson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:00
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C10G11/14; C10G11/18
Claims Analysis
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |