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US2797903A
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US
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Contacting vessel
Assignee: Universal Oil Products Co
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Filing: 1955-07-19
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Granted: 1957-07-02
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Urban Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B01F; B01F35/00; B01F35/50; B01F35/511; B01J19/18; B01J2219/00; B01J2219/00049; B01J2219/00164; B01J2219/00168; B01J2219/18; B01J2219/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1107339A
Cited
US1622294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |