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Patent US3470912A successfully refreshed from Google Patents.
US3470912A
Expired / Lapsed
US
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Flow inverter
Assignee: EIDP Inc
•
Filing: 1966-11-30
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Granted: 1969-10-07
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Expires: 1986-11-30
Abstract
No abstract record available.
Inventors
- 👤 Bruce Alfred Bydal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:27
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/432; B01F25/434; F16; F16L; F16L55/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |