US2479247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined water gauge and air volume control
Assignee: Individual
•
Filing: 1946-05-15
•
Granted: 1949-08-16
•
Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Rufus J Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:05
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3137
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US367524A
Cited
US1201660A
Cited
US2183421A
Cited
US2172097A
Cited
US2279948A
Cited
US2421237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |