Patent US1879020A successfully refreshed from Google Patents.
US1879020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic by-pass valve
Assignee: Landis Tool Co
•
Filing: 1929-05-29
•
Granted: 1932-09-27
•
Expires: 1949-05-29
Abstract
No abstract record available.
Inventors
- 👤 Balsiger Harold Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:24
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/22; F16K3/24; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925; Y10T137/7929
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) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |