US2483600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high-viscosity extreme pressure base by airblowing
Assignee: Pure Oil Co
•
Filing: 1946-05-16
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Granted: 1949-10-04
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Expires: 1966-05-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Stucker
- 👤 Ernest T Fronczak
- 👤 Wolfram George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:56
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2211306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |