US3809601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded joint and method
Assignee: National Aeronautics and Space Administration
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Filing: 1972-09-18
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Granted: 1974-05-07
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Expires: 1992-09-18
Abstract
Abstract AN IMPROVED JOINT FOR REDUCING THE PEAK SHEAR STRESS IN ADHESIVE BONDS WHEN ADHESIVES ARE USED TO BOND TWO MATERIALS WHICH ARE IN A LAPPED RELATIONSHIP AND WHICH DIFFER IN VALUE OF MODULUS OF ELECTRICITY. AN INERT PLACED BETWEEN THE ADHESIVE AND ONE OF THE TWO MATERIALS ACTS TO CUSHION THE DISCONTINUITY OF MATERIAL SITIFFNESS THEREBY REDUCING THE PEAK SHEAR STRESS IN THE ADHESIVE BOND.
Inventors
- 👤 J Fletcher
- 👤 Carter J Sainsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/116; B29C66/1162; B29C66/40; B29C66/41; B29C66/43; B29C65/4805; B29C65/483; B29C65/4835; B29C66/70; B29C66/71; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24521; Y10T428/24752; Y10T428/24777; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |