US3430850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: PERFECTION ENG CO Inc
•
Filing: 1967-11-13
•
Granted: 1969-03-04
•
Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lafayette E Gilreath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/20; B04B2001/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2614748A
Cited
US3143504A
Cited
US3200068A
Cited
US3148145A
Cited
US3273789A
Cited
US3279687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |