US2652360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidizing siliceous earth formations
Assignee: Pure Oil Co
•
Filing: 1951-05-10
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Granted: 1953-09-15
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Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 Roy H Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A COMPOSITION FOR DISSOLVING SUBSTANTIAL PORTIONS OF SILICA COMPRISING HYDROFLUORIC ACID AND A HALOGENATED ORGANIC CARBOXYLIC ACID, SAID HALOGENATED ORGANIC CARBOXYLIC ACID BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE REACTION OF SAID HYDROFLUORIC ACID WITH SAID SILICA.
Claim 2
Dependent Claim
39 words
A COMPOSITION FOR DISSOLVING SUBSTANTIAL PORTIONS OF SILICA COMPRISING HYDROFLUORIC ACID AND A HALOGENATED ORGANIC CARBOXYLIC ACID, SAID HALOGENATED ORGANIC CARBOXYLIC ACID BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE REACTION OF SAID HYDROFLUORIC ACID WITH SAID SILICA.
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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |