US2513323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluted spot welding electrode
Assignee: Duracell Inc USA
•
Filing: 1947-06-03
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Granted: 1950-07-04
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Expires: 1967-06-03
Abstract
No abstract record available.
Inventors
- 👤 Franz R Hensel
- 👤 Edman F Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:23
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009; B23K35/00; B23K35/02; B23K35/0205; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189815555A
Cited
US2250645A
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US2355145A
Cited
US2351230A
Cited
US2446932A
Cited
US2379983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |