US2457378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas control valve
Assignee: AUTOMATIC PRODUCTS CO
•
Filing: 1944-06-05
•
Granted: 1948-12-28
•
Expires: 1964-06-05
Abstract
No abstract record available.
Inventors
- 👤 Roy W Johnson
- 👤 Cedric E Zarwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:41
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1919
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1842328A
Cited
US1908477A
Cited
US1961324A
Cited
US2085300A
Cited
US1980789A
Cited
US2177380A
Cited
US2159617A
Cited
US2185978A
Cited
US2288890A
Cited
US2247060A
Cited
US2293556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |