US2970959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 09:31
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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Cited
US2593057A
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US2594431A
Cited
US2658036A
Cited
US2795560A
Cited
US2764242A
Cited
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 |