Patent US3239250A successfully refreshed from Google Patents.
US3239250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for hollow structures
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1962-10-01
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Granted: 1966-03-08
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Fonda-Bonardi Giusto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:12
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A REUSABLE COUPLING COMPRISING: OUTER AND INNER GENERALLY CYLINDRICAL CONCENTRIC HOLLOW MEMBERS OF DIFFERENT COEFFICIENTS OF THERMAL EXPANSION; THE OUTER MEMBER OF COMPARATIVELY SOFTER METAL FORMING A BELLOWS-LIKE RESILIENT SHEATH ENCLOSING SAID INNER MEMBER AND TERMINATING AT ONE END IN A SURFACE TRANSVERSE TO ITS CYLINDRICALLY AXIS; THE INNER MEMBER OF COMPARATIVELY HARDER METAL TERMINATING IN A RIM FOR SEALINGLY ENGAGING SAID SURFACE; AND
Claim 2
Dependent Claim
64 words
A REUSABLE COUPLING COMPRISING: OUTER AND INNER GENERALLY CYLINDRICAL CONCENTRIC HOLLOW MEMBERS OF DIFFERENT COEFFICIENTS OF THERMAL EXPANSION; THE OUTER MEMBER OF COMPARATIVELY SOFTER METAL FORMING A BELLOWS-LIKE RESILIENT SHEATH ENCLOSING SAID INNER MEMBER AND TERMINATING AT ONE END IN A SURFACE TRANSVERSE TO ITS CYLINDRICALLY AXIS; THE INNER MEMBER OF COMPARATIVELY HARDER METAL TERMINATING IN A RIM FOR SEALINGLY ENGAGING SAID SURFACE; AND
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |