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US2549142A
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Well drilling composition
Assignee: Pacific Lumber Co
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Filing: 1948-05-04
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Granted: 1951-04-17
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Expires: 1968-05-04
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:04
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN AQUEOUS DRILLING MUD MADE UP OF A MAJOR PROPORTION OF WATER INSOLUBLE CLAYEY MATERIAL AND CHARACTERIZED BY THE PRESENCE OF A MINOR PROPORTION OF AN ALKALI METAL HYDROXIDEREDWOOD BARK DUST REACTION PRODUCT SUFFICIENT TO REDUCE THE VISCOSITY, GEL STRENGTH AND/OR WATER LOSS OF SAID AQUEOUS DRILLING MUD.
Claim 2
Dependent Claim
48 words
AN AQUEOUS DRILLING MUD MADE UP OF A MAJOR PROPORTION OF WATER INSOLUBLE CLAYEY MATERIAL AND CHARACTERIZED BY THE PRESENCE OF A MINOR PROPORTION OF AN ALKALI METAL HYDROXIDEREDWOOD BARK DUST REACTION PRODUCT SUFFICIENT TO REDUCE THE VISCOSITY, GEL STRENGTH AND/OR WATER LOSS OF SAID AQUEOUS DRILLING MUD.
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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |