Patent US3677941A successfully refreshed from Google Patents.
US3677941A
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US
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Oil fracturing propping agents
Assignee: Standard Oil Co
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Filing: 1969-10-29
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Granted: 1972-07-18
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Expires: 1989-10-29
Abstract
Abstract SUBSTANTIALLY SPHERICAL OIL-SOLUBLE PROPPING PARTICLES FOR USE IN FRACTURING UNDERGROUND OIL OR GAS FORAMTIONS COMPRISE POLYMERIZED ALICYCLIC OLEFINIC HYDROCARBONS CONTAINING ANTI-OXIDANTS WHICH INHIBIT THE FORMATION OF OILINSOLUBLE RESIDUE IN SUCH PARTICLES.
Inventors
- 👤 Vincent B Mazzara
- 👤 Jerome M Fesperman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:35
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267; C; C09; C09K; C09K8/00; C09K8/60; C09K8/80; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |