Patent US3469520A successfully refreshed from Google Patents.
US3469520A
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Assignee: Mobil Oil AS
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Filing: 1967-11-01
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Granted: 1969-09-30
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Expires: 1987-11-01
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Foy
- 👤 Thomas K Provence Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:14
CPC Classifications
G; G09; G09F; G09F15/00; G09F15/0006; G09F15/0037; G09F23/00; G09F7/00; G09F7/18; G09F2007/1804; G09F2007/1817
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1719932A
Cited
US1706389A
Cited
US1868730A
Cited
US2601820A
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US2825276A
Cited
US3031783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |