US3451608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction welding apparatus
Assignee: Caterpillar Inc
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Filing: 1967-10-24
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Granted: 1969-06-24
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Expires: 1987-10-24
Abstract
No abstract record available.
Inventors
- 👤 Gerald W Deemie
- 👤 Ira H Sage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B23Q; B23Q1/00; B23Q1/01; B23Q1/017; B23Q1/25; B23Q1/26; B23Q1/262
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3396893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |