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Patent US2777818A successfully refreshed from Google Patents.
US2777818A
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Composition and method for controlling scale in oil wells
Assignee: UNITED CHEMICAL CORP OF NEW ME
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Filing: 1954-10-08
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Granted: 1957-01-15
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Expires: 1974-10-08
Abstract
No abstract record available.
Inventors
- 👤 Gambill Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:59
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A COMPOSITION FOR CONTROLLING SCALE FORMATAION IN SYSTEMS WHERE CONDITIONS ARE ONDUCTIVE TO FORMATAION OF SCALE OR LIQUID CONTACTING SURFACES WHICH COMPRISES AN ALKALI METAL POLYHOSPHATE, A POLYAMINO POLYCARBOXYLIC ACID CHELATING AGENT, AND A CACTUS EXTRACT, THE AMOUNT THEREOF BEING SUCH THAT THE WEIGHT RATIO OF PHOSPHATE TO CHELATING AGENT TO CACTUS EXTRACT IS IN THE RANGE FROM ABOUT 1:1:1 TO ABOUT 10:1:0:1.
Claim 2
Dependent Claim
63 words
A COMPOSITION FOR CONTROLLING SCALE FORMATAION IN SYSTEMS WHERE CONDITIONS ARE ONDUCTIVE TO FORMATAION OF SCALE OR LIQUID CONTACTING SURFACES WHICH COMPRISES AN ALKALI METAL POLYHOSPHATE, A POLYAMINO POLYCARBOXYLIC ACID CHELATING AGENT, AND A CACTUS EXTRACT, THE AMOUNT THEREOF BEING SUCH THAT THE WEIGHT RATIO OF PHOSPHATE TO CHELATING AGENT TO CACTUS EXTRACT IS IN THE RANGE FROM ABOUT 1:1:1 TO ABOUT 10:1:0:1.
References Cited (Backward Citations)
US2012641A
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US2240957A
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US2281392A
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US2429594A
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US2470132A
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US2592511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |