US3448015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation process with polymerization inhibitor addition at specific locations for the purification of polymerizable organic compounds
Assignee: Phillips Petroleum Co
•
Filing: 1967-12-21
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Granted: 1969-06-03
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Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald S Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:13
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/20; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2388834A
Cited
US2473203A
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US2526963A
Cited
US2613175A
Cited
US3340160A
Cited
US3360443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |