Patent US2579567A successfully refreshed from Google Patents.
US2579567A
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US
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Means for controlling the flow of a fluid heat transfer medium
Assignee: Pfaudler Inc
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Filing: 1946-11-30
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Granted: 1951-12-25
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Expires: 1966-11-30
Abstract
No abstract record available.
Inventors
- 👤 Otto W Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:53
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US653120A
Cited
US766442A
Cited
US1382735A
Cited
US1929706A
Cited
US2002242A
Cited
US2109694A
Cited
US2317480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |