US2464487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit for corrosive fluids
Assignee: Standard Oil Development Co
•
Filing: 1944-07-26
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Granted: 1949-03-15
•
Expires: 1964-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert E Chappell
- 👤 Clayton M Beamer
- 👤 Ralph B Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
F; F16; F16L; F16L58/00; B; B65; B65D; B65D85/00; B65D85/70; B65D85/84; F16L58/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US33152A
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US38112A
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US595437A
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CH9475A
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US785176A
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US895412A
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US930927A
Cited
GB190911406A
Cited
US1644361A
Cited
US2006226A
Cited
DE686441C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |