US2415987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for butt welding
Assignee: W K Mitchell & Co Inc
•
Filing: 1943-05-27
•
Granted: 1947-02-18
•
Expires: 1963-05-27
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Bissout
- 👤 William Y Borresen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
B; B23; B23K; B23K33/00; B23K33/004
Claims Analysis
Total Claims: 0
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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) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |