Patent US2635859A successfully refreshed from Google Patents.
US2635859A
Expired / Lapsed
US
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Mixer apparatus
Assignee: Individual
•
Filing: 1950-06-12
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Granted: 1953-04-21
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Expires: 1970-06-12
Abstract
No abstract record available.
Inventors
- 👤 Felix W Dreyfus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:25
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/062; B; B01; B01F; B01F33/00; B01F33/80; B01F33/82; B01F33/822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1291877A
Cited
US1878685A
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US1933346A
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US1992261A
Cited
US2114547A
Cited
US2135261A
Cited
US2509288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |