US1423923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving apparatus
Assignee: Individual
•
Filing: 1921-04-28
•
Granted: 1922-07-25
•
Expires: 1941-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jr James Clendenin Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:18
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/20; B63C11/205; B63C11/207; F; F16; F16K; F16K15/00; F16K15/14; F16K15/1401; F16K15/1402; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/7887
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) | 1925-07-24 | 1926-01-23 | 1926-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-24 | 1930-01-23 | 1930-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-24 | 1934-01-23 | 1934-07-25 | $7700.00 | Window Closed / Lapsed |