Patent US2551212A successfully refreshed from Google Patents.
US2551212A
Expired / Lapsed
US
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Diaphragm pressure indicating instrument
Assignee: Elsag Bailey Inc
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Filing: 1945-05-30
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Granted: 1951-05-01
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Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Howe Thomas Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/08; G01L7/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19902E
Cited
US2138152A
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GB187283A
Cited
FR632245A
Cited
US2081950A
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US2090160A
Cited
US2199013A
Cited
US2340395A
Cited
US2366566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |