US2552569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow responsive apparatus
Assignee: Houdry Process Corp
•
Filing: 1944-03-21
•
Granted: 1951-05-15
•
Expires: 1964-03-21
Abstract
No abstract record available.
Inventors
- 👤 Francis J Mcnamara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0013; G01P13/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US234747A
Cited
US518653A
Cited
US674206A
Cited
US1400469A
Cited
AT132361B
Cited
GB463280A
Cited
US2368672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |