US2944842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-tight flanged pipe coupoling
Assignee: High Voltage Engineering Corp
•
Filing: 1953-04-09
•
Granted: 1960-07-12
•
Expires: 1973-04-09
Abstract
No abstract record available.
Inventors
- 👤 Bernard G E Stiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:14
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB177786A
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US2525652A
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GB644845A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |