US2424746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement manufacture
Assignee: Bird Machine Co Inc
•
Filing: 1940-09-25
•
Granted: 1947-07-29
•
Expires: 1960-09-25
Abstract
No abstract record available.
Inventors
- 👤 Frank A Downes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1784462A
Cited
US1842372A
Cited
US1985868A
Cited
US2090363A
Cited
US2125663A
Cited
US2151175A
Cited
GB483822A
Cited
US2144254A
Cited
US2149220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |