Patent US2750073A successfully refreshed from Google Patents.
US2750073A
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Apparatus for proportioning dry material and liquids
Assignee: B-I-F Ind Inc
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Filing: 1952-09-17
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Granted: 1956-06-12
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Expires: 1972-09-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul A Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:25
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/80; B01F35/83; B01F35/831; B01F35/71; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3124; B01F25/31243; B01F25/80; B01F25/85; B01F35/712; B01F35/714; B01F35/717; B01F35/7179; B01F35/718
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |