US3477208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielded liquid zone gas-liquid separator
Assignee: BEN R KELLER SR
•
Filing: 1966-12-16
•
Granted: 1969-11-11
•
Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Ben R Keller Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:00
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042; B01D45/00; B01D45/04; B01D45/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2777533A
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US2910136A
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US3009536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |