Patent US3213017A successfully refreshed from Google Patents.
US3213017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting deposition of sodium chloride
Assignee: Calgon Corp
•
Filing: 1962-09-26
•
Granted: 1965-10-19
•
Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 Paul H Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:58
CPC Classifications
C; C23; C23F; C23F15/00; C23F15/005; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
METHOD OF INHIBITING THE DEPOSITION OF SODIUM CHLORIDE ON OILFIELD TUBING AND EQUIPMENT IN CONTACT WITH A SATURATED SODIUM CHLORIDE OILFIELD BRINE, WHICH IS LOW IN SULFATES AND CARBONATES, COMPRISIG ADDING TO SAID SATURRATED SODIUM CHLORIDE OILFIELD BRINE PRIOR TO COOLING AT LEAST ABOUT 1 PART ALKALI METAL PHOSPHATE PERMILLION PARTS OF BRINE, SAID PHOSPHATE HAVING ARATION OF A2O:P2O5 OF FROM ABOUT 0.9:1 TO ABOUT 1.05:1, WHERE A IS AN ALKALI METAL.
Claim 2
Dependent Claim
72 words
METHOD OF INHIBITING THE DEPOSITION OF SODIUM CHLORIDE ON OILFIELD TUBING AND EQUIPMENT IN CONTACT WITH A SATURATED SODIUM CHLORIDE OILFIELD BRINE, WHICH IS LOW IN SULFATES AND CARBONATES, COMPRISIG ADDING TO SAID SATURRATED SODIUM CHLORIDE OILFIELD BRINE PRIOR TO COOLING AT LEAST ABOUT 1 PART ALKALI METAL PHOSPHATE PERMILLION PARTS OF BRINE, SAID PHOSPHATE HAVING ARATION OF A2O:P2O5 OF FROM ABOUT 0.9:1 TO ABOUT 1.05:1, WHERE A IS AN ALKALI METAL.
Claim 3
Dependent Claim
72 words
METHOD OF INHIBITING THE DEPOSITION OF SODIUM CHLORIDE ON OILFIELD TUBING AND EQUIPMENT IN CONTACT WITH A SATURATED SODIUM CHLORIDE OILFIELD BRINE, WHICH IS OW IN SULFATES AND CARBONATES, COMPRISING ADDING TO SAID SATURATED SODIUM CHLORIDE OILFIELD BRINE PRIOR TO COOLING AT LEAST ABOUT 1 PART ALKALINE EARTH METALL PHOSPATE PER MILLION PARTS OF BRINE, SAID PHOSPHATE HAVING A RATIO OF MO:P2O5 OF ABOUT 1:1, WHERE M IS AN ALKALINE EARTH METAL.
Claim 4
Dependent Claim
72 words
METHOD OF INHIBITING THE DEPOSITION OF SODIUM CHLORIDE ON OILFIELD TUBING AND EQUIPMENT IN CONTACT WITH A SATURATED SODIUM CHLORIDE OILFIELD BRINE, WHICH IS OW IN SULFATES AND CARBONATES, COMPRISING ADDING TO SAID SATURATED SODIUM CHLORIDE OILFIELD BRINE PRIOR TO COOLING AT LEAST ABOUT 1 PART ALKALINE EARTH METALL PHOSPATE PER MILLION PARTS OF BRINE, SAID PHOSPHATE HAVING A RATIO OF MO:P2O5 OF ABOUT 1:1, WHERE M IS AN ALKALINE EARTH METAL.
References Cited (Backward Citations)
US2429594A
Cited
US2906599A
Cited
US2777818A
Cited
GB848328A
Cited
US2970959A
Cited
US3021901A
Cited
US3076757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |