US2720341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible non-bridging powder hopper
Assignee: Wyeth Holdings LLC
•
Filing: 1950-09-02
•
Granted: 1955-10-11
•
Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Stirn Frank Edwin
- 👤 Taylor Arthur Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/10; G01F11/12; G01F11/20; G01F11/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US386253A
Cited
US1197821A
Cited
US1321262A
Cited
US1487058A
Cited
US1570795A
Cited
US2116105A
Cited
US2164483A
Cited
US2260926A
Cited
US2416099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |