Patent US2333567A successfully refreshed from Google Patents.
US2333567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process of forming flame or explosion traps
Assignee: Individual
•
Filing: 1940-12-28
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Granted: 1943-11-02
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Expires: 1960-12-28
Abstract
No abstract record available.
Inventors
- 👤 Helmore William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:58
CPC Classifications
A; A62; A62C; A62C4/00; A62C4/02
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) | 1946-11-01 | 1947-05-03 | 1947-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-01 | 1951-05-03 | 1951-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-01 | 1955-05-03 | 1955-11-02 | $7700.00 | Window Closed / Lapsed |