Patent US3468428A successfully refreshed from Google Patents.
Patent US2809276A successfully refreshed from Google Patents.
US2809276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of welding tubes to plates
Assignee: International Motors LLC
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Filing: 1955-10-10
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Granted: 1957-10-08
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Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 David T Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:49
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/06; B23K11/061; B23K2101/00; B23K2101/04; B23K2101/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2306772A
Cited
GB554389A
Cited
US2473633A
Cited
US2612351A
Cited
US2473634A
Cited
US2646971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |