US2748990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the feed of liquid to concrete mixers
Assignee: Individual
•
Filing: 1952-08-25
•
Granted: 1956-06-05
•
Expires: 1972-08-25
Abstract
No abstract record available.
Inventors
- 👤 Kemper Maxwell Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/04; B28C7/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1323234A
Cited
US1103939A
Cited
US1794995A
Cited
US1959695A
Cited
US1879051A
Cited
US1930618A
Cited
US2537585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |