US2448460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing an inorganic hydrogel
Assignee: Standard Oil Development Co
•
Filing: 1944-03-07
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Granted: 1948-08-31
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Expires: 1964-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jerry A Pierce
- 👤 Jr Charles N Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01J2/08; B01J21/00; B01J21/12; C01P; C01P2004/00; C01P2004/30; C01P2004/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191515365A
Cited
GB100073A
Cited
US1584716A
Cited
US1614636A
Cited
US1896055A
Cited
US2284248A
Cited
US2385217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |