Patent US2670878A successfully refreshed from Google Patents.
US2670878A
Expired / Lapsed
US
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Proportioning device
Assignee: Individual
•
Filing: 1950-05-29
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Granted: 1954-03-02
•
Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 John J Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:07
CPC Classifications
A; A61; A61C; A61C19/00; B; B01; B01F; B01F35/00; B01F35/71; B01F35/714; B01F35/7141; A61C5/00; A61C5/60; A61C5/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US780680A
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US1031299A
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US1343924A
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US1286881A
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US1956460A
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US2405507A
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US2510317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |