US2980075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm equalizing means and valve assemblies for totalizers
Assignee: Hagan Chemicals and Controls Inc
•
Filing: 1959-03-02
•
Granted: 1961-04-18
•
Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin A Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:21
CPC Classifications
F; F15; F15C; F15C4/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1992048A
Cited
US2285540A
Cited
US2304783A
Cited
US2261462A
Cited
US2505981A
Cited
US2787255A
Cited
US2667385A
Cited
US2669129A
Cited
US2671433A
Cited
US2825361A
Cited
US2882916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |