Patent US3234647A successfully refreshed from Google Patents.
US3234647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction welding
Assignee: AMF Inc
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Filing: 1964-05-11
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Granted: 1966-02-15
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Hollander Milton Bernard
- 👤 Rosenberg Edgar Lynn Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:13
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
IN A METHOD OF FRICTION WELDING IN WHCIH: (A) WORKPIECES ARE ROTATED RELATIVE TO EACH OTHER; (B) SAID WORKPIECES ARE RUBBED TOGETHER UNDER PRESSURE; AND (C) THE RUBBING IS STOPPED, THE IMPROVEMENT IN WHICH TWO OUTER WORKPIECES ARE ROTATED SIMULTANEOUSLY AGAINST A CENTRAL STATIONARY WORKPIECE.
References Cited (Backward Citations)
GB572789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |