Patent US2631827A successfully refreshed from Google Patents.
US2631827A
Expired / Lapsed
US
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Apparatus for controlling proportions of materials
Assignee: CONVEYOR Co Inc
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Filing: 1951-04-16
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Granted: 1953-03-17
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Expires: 1971-04-16
Abstract
No abstract record available.
Inventors
- 👤 Walter E Saxe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/0007; G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/133; G05D11/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2285765A
Cited
US2344228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |