US2557682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensing vapor streams
Assignee: Standard Oil Development Co
•
Filing: 1945-02-21
•
Granted: 1951-06-19
•
Expires: 1965-02-21
Abstract
No abstract record available.
Inventors
- 👤 John W Packie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/10; C07C7/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1213795A
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US1213796A
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US1237767A
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US1893733A
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US2364660A
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US2242173A
Cited
US2306553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |