US2888026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic material proportioning system
Assignee: Reserve Mining Co
•
Filing: 1957-09-16
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Granted: 1959-05-26
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Ashland S Henderson
- 👤 Carroll D Cross
- 👤 John R Riede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/133; G05D11/134; G01; G01G; G01G19/00; G01G19/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1730893A
Cited
US2150440A
Cited
US2280656A
Cited
US2207327A
Cited
GB607821A
Cited
US2727733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |