US3236769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid treatment
Assignee: ExxonMobil Oil Corp
•
Filing: 1956-09-10
•
Granted: 1966-02-22
•
Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Burdyn
- 👤 Ludwig D Wiener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:25
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A DRILLING FLUID HAVING A SOLID PHASE AND A LIQUID PHASE, SAID SOLID PHASE COMPRISING A CLAY CAPABLE OF BEING HYDRATED AND DISPERSED BY WATER WITH CONSEQUENT INCREASE IN THE YIELD POINT OF SAID DRILLING FLUID AND SAID LIQUID PHASE HAVING A CONTINUOUS WATER PHASE CAPABLE OF HYDRATING AND DISPERSING SAID CLAY WITH CONSEQUENT INCREASE IN THE YIELD POINT OF SAID DRILLING FLUID, AND CONTAINING A WATER-SOLUBLE, NON-IONIC COMPOUND HAVING SURFACE ACTIVE PROPERTIES AND CHARACTERIZED BY THE FORMULA
Claim 2
Dependent Claim
78 words
A DRILLING FLUID HAVING A SOLID PHASE AND A LIQUID PHASE, SAID SOLID PHASE COMPRISING A CLAY CAPABLE OF BEING HYDRATED AND DISPERSED BY WATER WITH CONSEQUENT INCREASE IN THE YIELD POINT OF SAID DRILLING FLUID AND SAID LIQUID PHASE HAVING A CONTINUOUS WATER PHASE CAPABLE OF HYDRATING AND DISPERSING SAID CLAY WITH CONSEQUENT INCREASE IN THE YIELD POINT OF SAID DRILLING FLUID, AND CONTAINING A WATER-SOLUBLE, NON-IONIC COMPOUND HAVING SURFACE ACTIVE PROPERTIES AND CHARACTERIZED BY THE FORMULA
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |