US2467177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange media
Assignee: Standard Oil Development Co
•
Filing: 1944-12-30
•
Granted: 1949-04-12
•
Expires: 1964-12-30
Abstract
No abstract record available.
Inventors
- 👤 John C Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:01
CPC Classifications
C; C09; C09K; C09K5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1213368A
Cited
US1988584A
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US2071482A
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US2233185A
Cited
US2258222A
Cited
US2349338A
Cited
US2384384A
Cited
US2375007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-11 | 1952-10-11 | 1953-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-11 | 1956-10-11 | 1957-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-11 | 1960-10-11 | 1961-04-12 | $7700.00 | Window Closed / Lapsed |