Patent US3428072A successfully refreshed from Google Patents.
US3428072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid processing system
Assignee: GHP Inc
•
Filing: 1966-03-18
•
Granted: 1969-02-18
•
Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Elmer Scott Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:52
CPC Classifications
A; A23; A23B; A23B11/00; A23B11/10; A23B11/12; A23B11/13; A23B11/133; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569; Y10T137/265; Y10T137/2668; Y10T137/2698; Y10T137/4673; Y10T137/4807; Y10T137/4857; Y10T137/7287; Y10T137/7297; Y10T137/7306; Y10T137/8593; Y10T137/86389
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3056417A
Cited
US3181556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |