US2114161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic copper
Assignee: Copperweld Steel Co
•
Filing: 1935-12-04
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Granted: 1938-04-12
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Expires: 1955-12-04
Abstract
No abstract record available.
Inventors
- 👤 Frank L Antisell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/22; C25D5/60; C25D5/615; C25D5/617; C25D5/619; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12451; Y10T428/12458; Y10T428/12465; Y10T428/12493; Y10T428/12639
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) | 1941-04-11 | 1941-10-11 | 1942-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-11 | 1945-10-11 | 1946-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-11 | 1949-10-11 | 1950-04-12 | $7700.00 | Window Closed / Lapsed |