US3705792A
Expired / Lapsed
US
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Liquid flow proportioning system for metering into a glass batch
Assignee: OI Glass Inc
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Filing: 1971-06-14
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Granted: 1972-12-12
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Expires: 1991-06-14
Abstract
Abstract A liquid flow proportioning system, particularly useful for metering caustic soda into a glass batch, in which aflow control valve is held in a fixed position during periods of no flow to avoid transient effects upon the resumption of liquid flow. The control system also holds a set point feedback controller in a fixed operational mode during periods of no flow and additionally includes a system leak detector, a failure of flow alarm and a full flow alarm.
Inventors
- 👤 Homer D F Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:35
CPC Classifications
C; C03; C03B; C03B1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529; Y10T137/2531
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |