US2620665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitive manometer
Assignee: British Iron and Steel Research Association BISRA
•
Filing: 1949-06-02
•
Granted: 1952-12-09
•
Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Carlisle Samuel Skipton
- 👤 Smith Bernard Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02; G01L13/025; G01L11/00; G01L11/004; G01L11/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718494A
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US1568140A
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US2117894A
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US2360751A
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US2511752A
Cited
GB653536A
Cited
US2495157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |