Patent US2561525A successfully refreshed from Google Patents.
US2561525A
Expired / Lapsed
US
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Apparatus for proportional mixing
Assignee: —
•
Filing: —
•
Granted: 1951-07-24
•
Expires: 1968-07-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/04; B; B01; B01F; B01F33/00; B01F33/50; B01F33/501; B01F33/5011; B01F33/80; B01F33/84; B01F35/00; B01F35/20; B01F35/21; B01F35/213; B01F35/40; B01F35/42; B01F35/423; B01F35/80; B01F35/88; B01F35/881; B44; B44D; B44D3/00; B44D3/06; B44D3/08; B01F2101/00; B01F2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US491800A
Cited
US952867A
Cited
US2469305A
Cited
US661562A
Cited
US1393746A
Cited
FR558463A
Cited
US2169952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |