Patent US3122503A successfully refreshed from Google Patents.
US3122503A
Expired / Lapsed
US
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Dispersing clayey deposits
Assignee: Dow Chemical Co
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Filing: 1961-03-20
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Granted: 1964-02-25
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Melvin F Katzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/928
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A METHOD FOR TREATING OIL WELLS TO PROMOTE THE DISPERSION OF CLAYEY DEPOSITS THEREIN WHICH COMPRISES INTRODUCING INTO THE OIL WELL BORE AN AQUEOUS SOLUTION OF A HYPOCHLORITE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |