US2429319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing easily pulverized xerogel
Assignee: Standard Oil Development Co
•
Filing: 1943-03-26
•
Granted: 1947-10-21
•
Expires: 1963-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0056; B01J13/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1584716A
Cited
US1793350A
Cited
US2097634A
Cited
US2093454A
Cited
US2166868A
Cited
US2188007A
Cited
US2232727A
Cited
US2342249A
Cited
US2285449A
Cited
US2317803A
Cited
US2356773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |