US3462347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent purification and recovery by stripping and distillation
Assignee: Phillips Petroleum Co
•
Filing: 1966-12-16
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Granted: 1969-08-19
•
Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Weldin G Chapman
- 👤 Rollin N Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/02; Y; Y10; Y10S; Y10S526/00; Y10S526/912; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3326781A
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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) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |