US2247755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric contact
Assignee: Duracell Inc USA
•
Filing: 1940-02-03
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Granted: 1941-07-01
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Expires: 1960-02-03
Abstract
No abstract record available.
Inventors
- 👤 Franz R Hensel
- 👤 Kenneth L Emmert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:55
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/934; Y10S428/937; Y10S428/94; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12826; Y10T428/12833; Y10T428/12861; Y10T428/12875
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) | 1944-06-30 | 1944-12-30 | 1945-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-30 | 1948-12-30 | 1949-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-30 | 1952-12-30 | 1953-07-01 | $7700.00 | Window Closed / Lapsed |