Patent US4157282A successfully refreshed from Google Patents.
US3155162A
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Propping fractures with glass balls
Assignee: Pan American Petroleum Corp
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Filing: 1961-11-20
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Granted: 1964-11-03
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Don H Flickinger
- 👤 George C Howard
- 👤 Frederick H Rixe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267; Y; Y10; Y10S; Y10S507/00; Y10S507/906; Y10S507/922; Y10S507/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A COMPOSITION FOR FORMING AND PROPPING A FRACTURE IN AN EARTH FORMATION COMPRISING A CARRYING LIQUID AND SOLID BALLS MADE FROM GLASS HAVING AN ANALYSIS CONSISTING ESSENTIALLY OF ABOUT 62 PERCENT CALCIUM OXIDE, ABOUT 6 PERCENT BORON OXIDE, ABOUT 3 PERCENT SODIUM OXIDE, AND ABOUT 29 PERCENT SILICA, SAID BALLS BEING WITHIN THE SIZE RANGE PASSING A NUMBER 12 U.S. STANDARD SIEVE AND BEING RETAINED ON A NUMBER 16 U.S. STANDARD SIEVE, SAID BALLS HAVING AN AVERAGE CRUSHING STRENGTH OF AT LEAST ABOUT 200 POUNDS, AND MOST OF SAID BALLS HAVING A MINIMUM DIAMETER WHICH IS AT LEAST ABOUT 80 PERCENT OF THE MAXIMUM DIAMETER.
Claim 2
Dependent Claim
105 words
A COMPOSITION FOR FORMING AND PROPPING A FRACTURE IN AN EARTH FORMATION COMPRISING A CARRYING LIQUID AND SOLID BALLS MADE FROM GLASS HAVING AN ANALYSIS CONSISTING ESSENTIALLY OF ABOUT 62 PERCENT CALCIUM OXIDE, ABOUT 6 PERCENT BORON OXIDE, ABOUT 3 PERCENT SODIUM OXIDE, AND ABOUT 29 PERCENT SILICA, SAID BALLS BEING WITHIN THE SIZE RANGE PASSING A NUMBER 12 U.S. STANDARD SIEVE AND BEING RETAINED ON A NUMBER 16 U.S. STANDARD SIEVE, SAID BALLS HAVING AN AVERAGE CRUSHING STRENGTH OF AT LEAST ABOUT 200 POUNDS, AND MOST OF SAID BALLS HAVING A MINIMUM DIAMETER WHICH IS AT LEAST ABOUT 80 PERCENT OF THE MAXIMUM DIAMETER.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |