US2860860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting tray deck assembly
Assignee: Shell Development Co
•
Filing: 1952-10-25
•
Granted: 1958-11-18
•
Expires: 1972-10-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01D3/324; B01D3/326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US965366A
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US2210808A
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US2582826A
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FR988714A
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US2611596A
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US2611457A
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DE801473C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |