US2602647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular contactor with conical distribution plate
Assignee: Standard Oil Co
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Filing: 1951-03-30
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Granted: 1952-07-08
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Roy W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; F28D; F28D21/00; F28D2021/0019; F28D2021/0045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |