US2437740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable nose for spot welding tips
Assignee: Duracell Inc USA
•
Filing: 1945-10-26
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Granted: 1948-03-16
•
Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:01
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009; B23K11/3018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304227A
Cited
US1046639A
Cited
US1330563A
Cited
US1992990A
Cited
US2051284A
Cited
US2179693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |