Patent US2601050A successfully refreshed from Google Patents.
US2601050A
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Drilling fluid
Assignee: Texaco Development Corp
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Filing: 1948-09-15
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Granted: 1952-06-17
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Expires: 1968-09-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Nestle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:23
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN AQUEOUS DRILLING FLUID CONTAINING NOT LESS THAN ABOUT 17% MINERAL OIL BY VOLUME AND AT LEAST ONE OF THE FINELY DIVIDED CONSTITUENTS OF TREE BARK SELECTED FROM THE GROUP CONSISTING OF THE CORK FRACTION, THE BARK FIBER FRACTION, AND THE BARK POWDER FRACTION, SAID CONSTITUENT BEING PRESENT IN A PROPORTION OF NOT LESS THAN ABOUT 3 LBS. PER BBL. OF DRILLING FLUID.
Claim 2
Dependent Claim
63 words
AN AQUEOUS DRILLING FLUID CONTAINING NOT LESS THAN ABOUT 17% MINERAL OIL BY VOLUME AND AT LEAST ONE OF THE FINELY DIVIDED CONSTITUENTS OF TREE BARK SELECTED FROM THE GROUP CONSISTING OF THE CORK FRACTION, THE BARK FIBER FRACTION, AND THE BARK POWDER FRACTION, SAID CONSTITUENT BEING PRESENT IN A PROPORTION OF NOT LESS THAN ABOUT 3 LBS. PER BBL. OF DRILLING FLUID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |