US3176765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing calcareous porous formations
Assignee: Honeywell International Inc
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Filing: 1961-07-28
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Granted: 1965-04-06
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Donald E Hayford
- 👤 Sadle Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF SEALING POROUS UNDERGROUND FORMATIONS WHEREABY THE COMPRESSIVE STRENGTH IS GREATER THAN 100 P.S.I., THE PUMPING TIME IS ABOUT 10 TO ABOUT 30 MINUTES AND THE GEL TIME IS ABOUT 30 MINUTES TO ABOUT 3 HOURS WHICH COMPRISES IMPREGNATING THE POROUS FORMATION WITH A CLEAR MOBILE NON-RESINOUS FLUID COMPOSITION COMPOSED OF A MIXTURE OF 40 TO 70 PARTS BY WEIGHT OF A NON-RESINOUS UREA-FORMALDEHYDE CONDENSATION PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 120 TO 240; 15 TO 45 PARTS BY WEIGHT FREE FORMALDEHYDE; 20 TO 60 PARTS BY WEIGHT FREE UREA; ABOUT 30 TO 80 PARTS WATER; AND ABOUT 0.2 TO 2 PERCENT BY WEIGHT OF THE TOTAL MIXTURE OF ALKALI METAL HYDROXIDE, SAID MIXTURE HAVING A PH GREATER THAN 10.5.
Claim 2
Independent Claim
127 words
A METHOD OF SEALING POROUS UNDERGROUND FORMATIONS WHEREABY THE COMPRESSIVE STRENGTH IS GREATER THAN 100 P.S.I., THE PUMPING TIME IS ABOUT 10 TO ABOUT 30 MINUTES AND THE GEL TIME IS ABOUT 30 MINUTES TO ABOUT 3 HOURS WHICH COMPRISES IMPREGNATING THE POROUS FORMATION WITH A CLEAR MOBILE NON-RESINOUS FLUID COMPOSITION COMPOSED OF A MIXTURE OF 40 TO 70 PARTS BY WEIGHT OF A NON-RESINOUS UREA-FORMALDEHYDE CONDENSATION PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 120 TO 240; 15 TO 45 PARTS BY WEIGHT FREE FORMALDEHYDE; 20 TO 60 PARTS BY WEIGHT FREE UREA; ABOUT 30 TO 80 PARTS WATER; AND ABOUT 0.2 TO 2 PERCENT BY WEIGHT OF THE TOTAL MIXTURE OF ALKALI METAL HYDROXIDE, SAID MIXTURE HAVING A PH GREATER THAN 10.5.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |