US2718307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air control for gravity separator
Assignee: Individual
•
Filing: 1950-12-26
•
Granted: 1955-09-20
•
Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Forsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:17
CPC Classifications
B; B03; B03B; B03B4/00; B03B4/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1695569A
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US1923917A
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US1971678A
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US1961449A
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US2028904A
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US2104922A
Cited
US2163342A
Cited
US2257624A
Cited
US2404414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |