US2858892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing porous formations
Assignee: Phillips Petroleum Co
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Filing: 1955-07-05
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Granted: 1958-11-04
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Paul G Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF SEALING A WATER-BEARING, POROUS FORMATION WHICH COMPRISES INTRODUCING INTO SAID FORMATION IN AN AMOUNT SUFFICIENT TO CONTACT ALL PARTS OF THE FORMATION TO BE SEALED, A MIXTURE CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A WATER SOLUBLE SALT OF A WATER-INSOLUBLE ORGANIC ACID AND A MATERIAL WHICH HYDROLYZES TO YIELD A FREE ACID SELECTED FROM THE GROUP CONSISTING OF WATER-INSOLUBLE ANHYDRIDES AND WATER-SOLUBLE ALKYL ESTERS OF CARBOXYLIC ACIDS.
Claim 2
Independent Claim
71 words
THE METHOD OF SEALING A WATER-BEARING, POROUS FORMATION WHICH COMPRISES INTRODUCING INTO SAID FORMATION IN AN AMOUNT SUFFICIENT TO CONTACT ALL PARTS OF THE FORMATION TO BE SEALED, A MIXTURE CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A WATER SOLUBLE SALT OF A WATER-INSOLUBLE ORGANIC ACID AND A MATERIAL WHICH HYDROLYZES TO YIELD A FREE ACID SELECTED FROM THE GROUP CONSISTING OF WATER-INSOLUBLE ANHYDRIDES AND WATER-SOLUBLE ALKYL ESTERS OF CARBOXYLIC ACIDS.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |