US2800428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination pretreating-hydroforming with platinum-type catalysts
Assignee: Standard Oil Co
•
Filing: 1953-09-14
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Granted: 1957-07-23
•
Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hengstebeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981305A
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US2035467A
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US2273299A
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US2338573A
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US2642381A
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US2651597A
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US2691623A
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US2671754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |