Patent US2775302A successfully refreshed from Google Patents.
US2775302A
Expired / Lapsed
US
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Process and device for inhibiting corrosion in wells
Assignee: Visco Products Co
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Filing: 1954-08-04
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Granted: 1956-12-25
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:21
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; E21B27/00; E21B27/02; Y; Y10; Y10S; Y10S220/00; Y10S220/917; Y10S507/00; Y10S507/902; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS OF INHIBITING CORROSION IN A WELL CONTAINING CORROSIVE FLUIDS WHICH COMPRISES DEPOSITING IN THE WELL A COMPARTMENTED CONTAINER COMPRISING A PLURALITY OF COMPARTMENTS, EACH CONTAINING A CORROSION INHIBITING CHEMICAL, AND WHICH ARE SO CONSTRUCTED AS TO DISSOLVE SUCCESSIVELY AND PERIODICALLY IN THE WELL FLUIDS THEREBY TO DISCHARGE SAID CORROSION INHIBITING CHEMICALS FROM SAID COMPARTMENT SUCCESSIVELY AND PERIODICALLY.
Claim 2
Dependent Claim
59 words
A PROCESS OF INHIBITING CORROSION IN A WELL CONTAINING CORROSIVE FLUIDS WHICH COMPRISES DEPOSITING IN THE WELL A COMPARTMENTED CONTAINER COMPRISING A PLURALITY OF COMPARTMENTS, EACH CONTAINING A CORROSION INHIBITING CHEMICAL, AND WHICH ARE SO CONSTRUCTED AS TO DISSOLVE SUCCESSIVELY AND PERIODICALLY IN THE WELL FLUIDS THEREBY TO DISCHARGE SAID CORROSION INHIBITING CHEMICALS FROM SAID COMPARTMENT SUCCESSIVELY AND PERIODICALLY.
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) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |