Patent US1697343A successfully refreshed from Google Patents.
US1697343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-relief apparatus and method
Assignee: CAMPBELL ENGINEERING Co
•
Filing: 1925-01-05
•
Granted: 1929-01-01
•
Expires: 1945-01-05
Abstract
No abstract record available.
Inventors
- 👤 Campbell Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:03
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/34; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/7722; Y10T137/7781; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87853
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1932-01-01 | 1932-07-02 | 1933-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-01 | 1936-07-02 | 1937-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-01 | 1940-07-02 | 1941-01-01 | $7700.00 | Window Closed / Lapsed |