US2879782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid proportionating system
Assignee: Individual
•
Filing: 1953-04-03
•
Granted: 1959-03-31
•
Expires: 1973-04-03
Abstract
No abstract record available.
Inventors
- 👤 Robert J Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:49
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; B; B64; B64C; B64C17/00; B64C17/10; B64D; B64D37/00; B64D37/02; B64D37/14; B64D37/20; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563280A
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US2532883A
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US2537498A
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US2509629A
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US2618157A
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US2582400A
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US2672880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |