Patent FR1068177A successfully refreshed from Google Patents.
US3198268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing fluid loss in well treatment
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1963-07-02
•
Granted: 1965-08-03
•
Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 Gordon P Lindblom
- 👤 John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR REDUCING FLUID LOSSES TO A POROUS SUBTERRANEAN FORMATION SURROUNDING A BOREHOLE IN THE EARTH WHICH COMPRISES INCORPORATING A MIXTURE OF HETEROPOLYSACCHARIDE AND BACTERIAL CELLS PRODUCED BY THE FERMENTATION OF AN AQUEOUS CARBOHYDRATE SOLUTION WITH BACTERIA OF THE GENUS XANTHOMONAS INTO AN AQUEOUS MEDIUM IN A CONCENTRATION BETWEEN ABOUT 0.005 PERCENT AND ABOUT 3.0 PERCENT BY WEIGHT, INJECTING SAID MEDIUM INTO SAID BOREHOLE IN CONTACT WITH SAID POROUS FORMATION, AND THEREAFTER WITHDRAWING SAID MEDIUM FROM SAID BOREHOLD.
Claim 2
Independent Claim
79 words
A METHOD FOR REDUCING FLUID LOSSES TO A POROUS SUBTERRANEAN FORMATION SURROUNDING A BOREHOLE IN THE EARTH WHICH COMPRISES INCORPORATING A MIXTURE OF HETEROPOLYSACCHARIDE AND BACTERIAL CELLS PRODUCED BY THE FERMENTATION OF AN AQUEOUS CARBOHYDRATE SOLUTION WITH BACTERIA OF THE GENUS XANTHOMONAS INTO AN AQUEOUS MEDIUM IN A CONCENTRATION BETWEEN ABOUT 0.005 PERCENT AND ABOUT 3.0 PERCENT BY WEIGHT, INJECTING SAID MEDIUM INTO SAID BOREHOLE IN CONTACT WITH SAID POROUS FORMATION, AND THEREAFTER WITHDRAWING SAID MEDIUM FROM SAID BOREHOLD.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |