Patent US3250329A successfully refreshed from Google Patents.
US3250329A
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US
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Consolidation using free radicals
Assignee: Shell USA Inc
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Filing: 1963-05-13
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Granted: 1966-05-10
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Prats Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:25
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2863510A
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US2804145A
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US2906340A
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US3055425A
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US3121462A
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US3070159A
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US3134435A
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US3172468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |