Patent US2835503A successfully refreshed from Google Patents.
US2005256A
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Method of spot welding refractory metals
Assignee: Heintz & Kaufman Ltd
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Filing: 1934-01-02
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Granted: 1935-06-18
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Expires: 1954-01-02
Abstract
No abstract record available.
Inventors
- 👤 William W Eitel
- 👤 Mccullough Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:45
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/005; B23K11/00; B23K11/16; B23K11/18; Y; Y10; Y10S; Y10S29/00; Y10S29/012; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/936; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-06-17 | 1938-12-17 | 1939-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-17 | 1942-12-17 | 1943-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-17 | 1946-12-17 | 1947-06-18 | $7700.00 | Window Closed / Lapsed |