Patent US2469230A successfully refreshed from Google Patents.
US2469230A
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Automatic apparatus for feeding liquid or gaseous materials
Assignee: Individual
•
Filing: 1945-01-18
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Granted: 1949-05-03
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Expires: 1965-01-18
Abstract
No abstract record available.
Inventors
- 👤 Harper Ester Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; E; E03; E03D; E03D1/00; E03D1/30; E03D1/32; G; G05; G05D; G05D16/00; G05D16/04; G05D16/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534; Y10T137/2536; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/7287; Y10T137/7297; Y10T137/7313; Y10T137/7358; Y10T137/7404; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB219067A
Cited
US1832786A
Cited
US1900642A
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US1983093A
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US2080267A
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US2158976A
Cited
US2269393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |