Patent US2693457A successfully refreshed from Google Patents.
US2693457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of porous solids
Assignee: ExxonMobil Oil Corp
•
Filing: 1952-05-10
•
Granted: 1954-11-02
•
Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Drake
- 👤 Robert L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:37
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J21/00; Y; Y10; Y10S; Y10S502/00; Y10S502/506
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A METHOD FOR ALTERING THE SURFACE CHARACTERISTICS OF A POROUS SOLID METAL OXIDE COMPOSITION WHICH COMPRISES LEACHING SAID COMPOSITION WITH ACETYLACETONE.
Claim 2
Independent Claim
21 words
A METHOD FOR ALTERING THE SURFACE CHARACTERISTICS OF A POROUS SOLID METAL OXIDE COMPOSITION WHICH COMPRISES LEACHING SAID COMPOSITION WITH ACETYLACETONE.
References Cited (Backward Citations)
US1905087A
Cited
US2055616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |