Patent US2808493A successfully refreshed from Google Patents.
US2808493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding of tubes and the like
Assignee: Individual
•
Filing: 1954-10-11
•
Granted: 1957-10-01
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1365198A
Cited
US1365199A
Cited
GB234373A
Cited
US1998496A
Cited
US2024906A
Cited
US2290338A
Cited
CH255846A
Cited
US2460687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |