US2443462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying spherical hydrogel catalysts
Assignee: Standard Oil Development Co
•
Filing: 1944-03-04
•
Granted: 1948-06-15
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Expires: 1964-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles N Kimberlin
- 👤 Jerry A Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:27
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/12; B01J21/00; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US677902A
Cited
US1389597A
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US1944452A
Cited
US2266636A
Cited
US2284248A
Cited
US2345600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |