US2607428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing composition and method for temporarily sealing oil wells
Assignee: Pure Oil Co
•
Filing: 1946-08-29
•
Granted: 1952-08-19
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 George G Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:48
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/003; C04B24/12; C04B24/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A COMPOSITION SUITABLE FOR SEALING EARTH FORMATIONS COMPRISING, HEMIHYDRATE CALCIUM SULFATE, ABOUT 15-45 PER CENT BY WEIGHT OF AN AMIDE HAVING AN NH2 RADICAL SUBSTITUTED FOR THE HDYROXYL SUBSTITUENT OF AN ACID DERIVED NUCLEUS, AND A NON-ALKALINE WATER SOLUBLE SET RETARDING AGENT FOR SAID SULFATE, THE COMPOSITION BEING CHARACTERIZED BY ITS ABILITY TO SET THROUGH HYDRATION WITH WATER TO A HARD SOLID CONTAINING THE AMIDE INTERSPERSED IN THE SOLID, THE SAID SOLID BEING RESISTANT TO ACID ATTACK BUT SUBJECT TO DISINTEGRATION BY ALKALIES THROUGH REACTION WITH THE AMIDE.
Claim 2
Dependent Claim
88 words
A COMPOSITION SUITABLE FOR SEALING EARTH FORMATIONS COMPRISING, HEMIHYDRATE CALCIUM SULFATE, ABOUT 15-45 PER CENT BY WEIGHT OF AN AMIDE HAVING AN NH2 RADICAL SUBSTITUTED FOR THE HDYROXYL SUBSTITUENT OF AN ACID DERIVED NUCLEUS, AND A NON-ALKALINE WATER SOLUBLE SET RETARDING AGENT FOR SAID SULFATE, THE COMPOSITION BEING CHARACTERIZED BY ITS ABILITY TO SET THROUGH HYDRATION WITH WATER TO A HARD SOLID CONTAINING THE AMIDE INTERSPERSED IN THE SOLID, THE SAID SOLID BEING RESISTANT TO ACID ATTACK BUT SUBJECT TO DISINTEGRATION BY ALKALIES THROUGH REACTION WITH THE AMIDE.
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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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |