US2820946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for leak detection and pressure measurement
Assignee: Consolidated Electrodynamics Corp
•
Filing: 1954-02-01
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Granted: 1958-01-21
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Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles F Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:26
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2081429A
Cited
US2526038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |