Patent US3454027A successfully refreshed from Google Patents.
US3454027A
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Proportional dispensing fluid handling system
Assignee: LESTER A FRIEDMAN JR
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Filing: 1966-01-26
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Granted: 1969-07-08
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Lester A Friedman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:10
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/001; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; F; F28; F28C; F28C1/00; F28F; F28F25/00; F28F25/02; F28F25/04; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2531; Y10T137/7287; Y10T137/7358; Y10T137/7423
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |