Patent EP0511686A2 successfully refreshed from Google Patents.
Patent US2970959A successfully refreshed from Google Patents.
US2970959A
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Composition and method for inhibiting scale
Assignee: Pan American Petroleum Corp
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Filing: 1958-06-17
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Granted: 1961-02-07
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Expires: 1978-06-17
Abstract
No abstract record available.
Inventors
- 👤 Loyd W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:24
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/105; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR INHIBITING THE DEPOSITION AND ADHERENCE OF CALCIUM SULFATE SCALE ON SSURFACES EXPOSED TO BRINES CONTAINING AT LEAST ABOUT 1,000 PARTS PER MILLION BY WEIGHT OF DISSOLVED SALTS COMPRISING DISPERSING INTO SAID BRINE BETWEEN ABOUT 3 AND ABOUT 50 PARTS PER MILLION BY WEIGHT OF A CARBOXYMETHYL CELLULOSE SALT OF A MONOVALENT CATION SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METALS AND AMMONIUM.
Claim 2
Independent Claim
66 words
A METHOD FOR INHIBITING THE DEPOSITION AND ADHERENCE OF CALCIUM SULFATE SCALE ON SSURFACES EXPOSED TO BRINES CONTAINING AT LEAST ABOUT 1,000 PARTS PER MILLION BY WEIGHT OF DISSOLVED SALTS COMPRISING DISPERSING INTO SAID BRINE BETWEEN ABOUT 3 AND ABOUT 50 PARTS PER MILLION BY WEIGHT OF A CARBOXYMETHYL CELLULOSE SALT OF A MONOVALENT CATION SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METALS AND AMMONIUM.
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |