US2207430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of petroleum distillates
Assignee: Standard Oil Co
•
Filing: 1937-08-16
•
Granted: 1940-07-09
•
Expires: 1957-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert E Burk
- 👤 Herman P Lankelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10G; C10G29/00; C10G29/20; C10L1/18; C10L1/182; C10L1/183; C10L1/22; C10L1/222; C10L1/223; C10L1/2235; C10L1/26; C10L1/2633; C10L1/2658
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-07-09 | 1944-01-08 | 1944-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-09 | 1948-01-08 | 1948-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-09 | 1952-01-08 | 1952-07-09 | $7700.00 | Window Closed / Lapsed |