US2527581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of earth formations
Assignee: Durez Plastics and Chemicals Inc
•
Filing: 1945-08-01
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Granted: 1950-10-31
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Expires: 1965-08-01
Abstract
No abstract record available.
Inventors
- 👤 Jay C Searer
- 👤 Alvin F Shepard
- 👤 Frank W Less
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/24; C09K17/26; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5086
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A LIQUID RESINOUS SEALING COMPOUND HAVING A PH GREATER THAN 7 FOR TREATMENT OF PERMEABLE EARTH FORMATIONS COMPRISING A MIXTURE OF (A) A PHENOL ALDEHYDE LIQUID RESIN WHEREIN THE AIDEHYDE IS BETWEEN 0.7 TO 2.5 MOLS PER MOL OF THE PHENOL AND (B) A RESORCINOL ALDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS LESS THAN 0.75 MOL PER MOL OF RESORCINOL, AND (C) A REACTIVE ALDEHYDE IN AN AMOUNT SUFFICIENT TO CONVERT THE MIXTURE TO AN INFUSIBLE, INSOLUBLE SET RESIN.
Claim 2
Dependent Claim
79 words
A LIQUID RESINOUS SEALING COMPOUND HAVING A PH GREATER THAN 7 FOR TREATMENT OF PERMEABLE EARTH FORMATIONS COMPRISING A MIXTURE OF (A) A PHENOL ALDEHYDE LIQUID RESIN WHEREIN THE AIDEHYDE IS BETWEEN 0.7 TO 2.5 MOLS PER MOL OF THE PHENOL AND (B) A RESORCINOL ALDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS LESS THAN 0.75 MOL PER MOL OF RESORCINOL, AND (C) A REACTIVE ALDEHYDE IN AN AMOUNT SUFFICIENT TO CONVERT THE MIXTURE TO AN INFUSIBLE, INSOLUBLE SET RESIN.
Claim 3
Independent Claim
98 words
THE METHOD OF TREATING A PERMEABLE ZONE IN AN EARTH FORMATION WHICH COMPRISES PLACING IN THE ZONE TO BE TREATED A LIQUID MIXTURE HAVING A PH GREATER THAN 7 COMPRISED OF (A) A PHENOL ALDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS BETWEEN 0.7 TO 2.5 MOLS PER MOL OF THE PHENOL AND (B) A RESORCINOL AIDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS LESS THAN 0.75 MOL PER MOL OF RESORCINOL, AND (C) A REACTIVE ALDEHYDE IN AN AMOUNT SUFFICIENT TO CONVERT THE MIXTURE TO AN INFUSIBLE, INSOLUBLE SET RESIN, AND FORMING A HARD SET RESIN IN SAID ZONE.
Claim 4
Independent Claim
98 words
THE METHOD OF TREATING A PERMEABLE ZONE IN AN EARTH FORMATION WHICH COMPRISES PLACING IN THE ZONE TO BE TREATED A LIQUID MIXTURE HAVING A PH GREATER THAN 7 COMPRISED OF (A) A PHENOL ALDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS BETWEEN 0.7 TO 2.5 MOLS PER MOL OF THE PHENOL AND (B) A RESORCINOL AIDEHYDE LIQUID RESIN WHEREIN THE ALDEHYDE IS LESS THAN 0.75 MOL PER MOL OF RESORCINOL, AND (C) A REACTIVE ALDEHYDE IN AN AMOUNT SUFFICIENT TO CONVERT THE MIXTURE TO AN INFUSIBLE, INSOLUBLE SET RESIN, AND FORMING A HARD SET RESIN IN SAID ZONE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |