US2052962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of etching
Assignee: Duracell Inc USA
•
Filing: 1934-12-31
•
Granted: 1936-09-01
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Expires: 1954-12-31
Abstract
No abstract record available.
Inventors
- 👤 Booe James Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:00
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; C; C23; C23F; C23F1/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12472
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) | 1939-09-01 | 1940-03-02 | 1940-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-01 | 1944-03-02 | 1944-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-01 | 1948-03-02 | 1948-09-01 | $7700.00 | Window Closed / Lapsed |