US2470438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption process
Assignee: Standard Oil Development Co
•
Filing: 1943-09-17
•
Granted: 1949-05-17
•
Expires: 1963-09-17
Abstract
No abstract record available.
Inventors
- 👤 Robert M Jackson
- 👤 Paul J Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:41
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22; B01D3/10; B01D53/00; B01D53/14; C; C10; C10G; C10G33/00; C10G33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |