Patent US3256902A successfully refreshed from Google Patents.
US3256902A
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US
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Automatic chemical injection control
Assignee: Phillips Petroleum Co
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Filing: 1961-10-30
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Granted: 1966-06-21
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Grady T Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:44
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; Y; Y10; Y10S; Y10S208/00; Y10S208/01; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
BASIC SEDIMENT AND WATER CONTROL APPARATUS COMPRISING A COMBINATION, A BASIC SEDIMENT AND WATER DETECTOR INCLUDING MEAN FOR PRODUCING AN ELECTRICAL SIGNAL IN PROPORTION TO THE SEDIMENT AND WATER CONTENT OF A FLUID, A SUMMING AMPLIFIER, A SAW-TOOTH VOLTAGE GENERATOR MEANS FOR FEEDING SAID SIGNAL TO SAID AMPLIFIER, MEANS FOR FEEDING THE OUTPUT OF SAID GENERATOR TO SAID AMPLIFIER AND THEREIN ADDING FOR INJECTING TREATING CHEMICAL INJECTION MEANS FOR INJECTING TREATING CHEMICAL INTO SAID FLUID, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER FOR ACTUATING SAID CHEMICAL INJECTION MEANS DURING THE TIME PERIODS THE OUTPUT OF SAID SUMMING AMPLIFIER EXCEEDS A PREDETERMINED VALUE.
Claim 2
Dependent Claim
104 words
BASIC SEDIMENT AND WATER CONTROL APPARATUS COMPRISING A COMBINATION, A BASIC SEDIMENT AND WATER DETECTOR INCLUDING MEAN FOR PRODUCING AN ELECTRICAL SIGNAL IN PROPORTION TO THE SEDIMENT AND WATER CONTENT OF A FLUID, A SUMMING AMPLIFIER, A SAW-TOOTH VOLTAGE GENERATOR MEANS FOR FEEDING SAID SIGNAL TO SAID AMPLIFIER, MEANS FOR FEEDING THE OUTPUT OF SAID GENERATOR TO SAID AMPLIFIER AND THEREIN ADDING FOR INJECTING TREATING CHEMICAL INJECTION MEANS FOR INJECTING TREATING CHEMICAL INTO SAID FLUID, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER FOR ACTUATING SAID CHEMICAL INJECTION MEANS DURING THE TIME PERIODS THE OUTPUT OF SAID SUMMING AMPLIFIER EXCEEDS A PREDETERMINED VALUE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |