Patent US3474815A successfully refreshed from Google Patents.
US3474815A
Expired / Lapsed
US
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Fluid proportioning and blending system
Assignee: Crown Cork and Seal Co Inc
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Filing: 1965-12-17
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Granted: 1969-10-28
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Expires: 1985-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert B Beahm
- 👤 Jerome E Grader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529; Y10T137/2534
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2770130A
Cited
US2800919A
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US2830245A
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US3020490A
Cited
US3214660A
Cited
US3229077A
Cited
US3322938A
Cited
US3315250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |