Patent US3473571A successfully refreshed from Google Patents.
US3473571A
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US
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Digitally controlled flow regulating valves
Assignee: DBA SA
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Filing: 1967-12-27
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Granted: 1969-10-21
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Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Pierre Henri Dugay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:48
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B13/00; F15B13/02; F15B13/04; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/078; G; G05; G05D; G05D7/00; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/41; F15B2211/411; F15B2211/42; F15B2211/426; F15B2211/455; F15B2211/60; F15B2211/665; F15B2211/6654; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86815; Y10T137/86823
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3239142A
Cited
US3364342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |