Patent US3346489A successfully refreshed from Google Patents.
US3346489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids
Assignee: Baker Petrolite LLC
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Filing: 1966-03-04
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Granted: 1967-10-10
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Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Woodrow J Dickson
- 👤 Fred W Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A DRILLING FLUID FOR WELLS CONTAINING AN EMULSION OF WATER AND OIL, A FINE DISPERSED SOLID WEIGHTING MATERIAL DISPERSED IN SAID EMULSION, AND A MINOR AMOUNT OF A LINEAR POLYMER OF A 1,2-ALKYLENEIMINE, SAID POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 800, EACH ALKYLENE UNIT THEREIN HAVING 2 TO 20 CARBON ATOMS.
Claim 2
Dependent Claim
53 words
A DRILLING FLUID FOR WELLS CONTAINING AN EMULSION OF WATER AND OIL, A FINE DISPERSED SOLID WEIGHTING MATERIAL DISPERSED IN SAID EMULSION, AND A MINOR AMOUNT OF A LINEAR POLYMER OF A 1,2-ALKYLENEIMINE, SAID POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 800, EACH ALKYLENE UNIT THEREIN HAVING 2 TO 20 CARBON ATOMS.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |