Patent US1350204A successfully refreshed from Google Patents.
US2723950A
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Process for reduction of vapor losses in barometric condenser evacuations
Assignee: Standard Oil Co
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Filing: 1952-05-14
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Granted: 1955-11-15
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Expires: 1972-05-14
Abstract
No abstract record available.
Inventors
- 👤 John L Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:43
CPC Classifications
C; C10; C10G; C10G5/00; C10G5/04; B; B01; B01D; B01D5/00; B01D5/0027; B01D5/0033; B01D5/0048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1847625A
Cited
US1848051A
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US2050329A
Cited
US2002731A
Cited
US2121218A
Cited
US2095265A
Cited
US2152155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |