US2569039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding screw for pulverulent or granular material
Assignee: MAXICALOR SOC
•
Filing: 1946-04-18
•
Granted: 1951-09-25
•
Expires: 1966-04-18
Abstract
No abstract record available.
Inventors
- 👤 Berthelot Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/24; B65G33/26; B65G33/265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US767762A
Cited
US1177792A
Cited
US1831561A
Cited
US2015526A
Cited
US2126776A
Cited
US2068018A
Cited
US2191219A
Cited
US2119941A
Cited
US2228947A
Cited
US2306189A
Cited
US2194006A
Cited
US2388294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |