US3079334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium base drilling fluid
Assignee: Amcol International Corp
•
Filing: 1960-09-02
•
Granted: 1963-02-26
•
Expires: 1980-09-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Clem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A CALCIUM-BASE DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF BENTONITE, A CALCIUM COMPOUND IN QUANTITY SUFFICIENT TO FORM A SATURATED AQUEOUS SOLUTION, AND 5 TO 20 POUNDS OF A THINNER PER 42-GALLON BARREL OF FLUID, SAID THINNER CONTAINING 50% TO 95% LEONARDITE BY WEIGHT AND 5% TO 50% SOLUBLE POLYPHOSPHATE BY WEIGHT, THE QUANTITIES OF MATERIALS BEING CALCULATED ON A DRY WEIGHT BASIS.
Claim 2
Dependent Claim
63 words
A CALCIUM-BASE DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF BENTONITE, A CALCIUM COMPOUND IN QUANTITY SUFFICIENT TO FORM A SATURATED AQUEOUS SOLUTION, AND 5 TO 20 POUNDS OF A THINNER PER 42-GALLON BARREL OF FLUID, SAID THINNER CONTAINING 50% TO 95% LEONARDITE BY WEIGHT AND 5% TO 50% SOLUBLE POLYPHOSPHATE BY WEIGHT, THE QUANTITIES OF MATERIALS BEING CALCULATED ON A DRY WEIGHT BASIS.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |