US3245866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous spheres of slag and slag-like materials and underground propplants
Assignee: Individual
•
Filing: 1961-11-24
•
Granted: 1966-04-12
•
Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267; Y; Y10; Y10S; Y10S507/00; Y10S507/906; Y10S507/922; Y10S507/924; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AS AN UNDERGROUND PROPPING AGENT A SOLID VITREOUS BODY OF SLAG HAVING A GENERALLY SPHERICAL SHAPE CHARACTERIZED BY A DENSITY SUBSTANTIALLY EQUAL TO THAT OF THE ORIGINAL SLAG FROM WHICH THE BODY WAS FORMED, A COMPRESSIVE STRENGTH IN EXCESS OF ABOUT 15,000 LB./IN.2, AND RESISTANCE TO CHEMICAL ATTACK AT TEMPERATURES UP TO ABOUT 250*F. AND CAPABLE OF PRODUCING A HIGH FRACTURE FLOW CAPACITY WHEN USED AS PROPPING AGENTS IN OIL OR GAS WELLS.
Claim 2
Dependent Claim
73 words
AS AN UNDERGROUND PROPPING AGENT A SOLID VITREOUS BODY OF SLAG HAVING A GENERALLY SPHERICAL SHAPE CHARACTERIZED BY A DENSITY SUBSTANTIALLY EQUAL TO THAT OF THE ORIGINAL SLAG FROM WHICH THE BODY WAS FORMED, A COMPRESSIVE STRENGTH IN EXCESS OF ABOUT 15,000 LB./IN.2, AND RESISTANCE TO CHEMICAL ATTACK AT TEMPERATURES UP TO ABOUT 250*F. AND CAPABLE OF PRODUCING A HIGH FRACTURE FLOW CAPACITY WHEN USED AS PROPPING AGENTS IN OIL OR GAS WELLS.
References Cited (Backward Citations)
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Cited
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Cited
US2919471A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |