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US2587531A
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Method of and apparatus for proportioning the constituents of materials
Assignee: CONVEYOR Co Inc
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Filing: 1951-02-05
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Granted: 1952-02-26
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Expires: 1971-02-05
Abstract
No abstract record available.
Inventors
- 👤 Walter E Saxe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:26
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1059; E01C19/1068; E01C19/1072; B; B28; B28C; B28C7/00; B28C7/0007; Y; Y10; Y10S; Y10S177/00; Y10S177/11
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |