US3832302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for inhibiting scale formation
Assignee: Halliburton Co
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Filing: 1972-01-17
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Granted: 1974-08-27
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Expires: 1992-01-17
Abstract
Abstract A COMPOSITION FOR INHIBITING SCALE AND METHODS OF USING SAID COMPOSITION CONSISTING OF A RELATIVELY WATER-INSOLUBLE ORGANIC PRECIPITATE FORMED BY THE REACTION OF A WATERSOLUBLE POLYELECTROLYTIC ORGANIC POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,000 TO ABOUT 100,000 AND A WATER-SOLUBLE ORGANIC CATIONIC SURFACE ACTIVE COMPOUND.
Inventors
- 👤 R Lansford
- 👤 T Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C09; C09K; C09K8/00; C09K8/52; C09K8/528
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |