US3022248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low fluid loss composition
Assignee: Pan American Petroleum Corp
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Filing: 1959-09-21
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Granted: 1962-02-20
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Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Duane B Anderson
- 👤 Park Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF FORMING A SUBSTANTIALLY WATER IMPERVIOUS LAYER ON A PERMEABLE BARRIER WHICH COMPRISES CONTACTING SAID BARRIER WITH AN AQUEOUS MIXTURE OF LIGNIN CONTAINING FROM ABOUT 2.5 TO ABOUT 7.5 WEIGHT PERCENT OF A WATER-SOLUBLE ALKALI METAL COMPOUND, BASED ON THE LIGNIN, WHICH IS PRESENT IN SAID MIXTURE IN A CONCENTRATION OF FROM ABOUT 1 TO ABOUT 10 POUNDS PER BARREL.
Claim 2
Independent Claim
62 words
A METHOD OF FORMING A SUBSTANTIALLY WATER IMPERVIOUS LAYER ON A PERMEABLE BARRIER WHICH COMPRISES CONTACTING SAID BARRIER WITH AN AQUEOUS MIXTURE OF LIGNIN CONTAINING FROM ABOUT 2.5 TO ABOUT 7.5 WEIGHT PERCENT OF A WATER-SOLUBLE ALKALI METAL COMPOUND, BASED ON THE LIGNIN, WHICH IS PRESENT IN SAID MIXTURE IN A CONCENTRATION OF FROM ABOUT 1 TO ABOUT 10 POUNDS PER BARREL.
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |