US2793189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids and emulsifiers therefor
Assignee: JBS USA LLC
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Filing: 1955-07-18
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Granted: 1957-05-21
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Albert G Schuessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A FLUID HAVING APPLICATION AS A WELL DRILLING AND COMPLETION FLUID COMPRISING A WATER-IN-OIL EMULSION CONTAINING AN EMULSIFTING AGENT COMPRISING POLYVALENT METAL SALT OF SULFATED SPERM OIL AND LECITHIN, THE RATIO OF LECITHIN TO SULFATED SPERM OIL SALT FALLING BETWEEN ABOUT 1:19 AND 1:4.
Claim 2
Dependent Claim
44 words
A FLUID HAVING APPLICATION AS A WELL DRILLING AND COMPLETION FLUID COMPRISING A WATER-IN-OIL EMULSION CONTAINING AN EMULSIFTING AGENT COMPRISING POLYVALENT METAL SALT OF SULFATED SPERM OIL AND LECITHIN, THE RATIO OF LECITHIN TO SULFATED SPERM OIL SALT FALLING BETWEEN ABOUT 1:19 AND 1:4.
References Cited (Backward Citations)
US2497398A
Cited
US2678320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |