Patent US3422680A successfully refreshed from Google Patents.
US3422680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure-responsive device
Assignee: Kingmann-White Inc
•
Filing: 1967-01-18
•
Granted: 1969-01-21
•
Expires: 1987-01-18
Abstract
No abstract record available.
Inventors
- 👤 Claude B Nolte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:50
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/06; G01L7/063; G01L19/00; G01L19/06; G01L19/0618; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |