Patent US3521674A successfully refreshed from Google Patents.
US3521674A
Expired / Lapsed
US
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Sampling valve
Assignee: Beckman Coulter Inc
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Filing: 1968-06-24
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Granted: 1970-07-28
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Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 Michael Dodson
- 👤 Gordon E Mehaffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:37
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N2030/204; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
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) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |