Patent US2422345A successfully refreshed from Google Patents.
US2422345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydraulic cement products
Assignee: Philip Carey Manufacturing Co
•
Filing: 1940-08-02
•
Granted: 1947-06-17
•
Expires: 1960-08-02
Abstract
No abstract record available.
Inventors
- 👤 Gustave L Easterberg
- 👤 Roger A Macarthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/522
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1819840A
Cited
US1039413A
Cited
US940449A
Cited
US1039266A
Cited
US1143931A
Cited
US1140601A
Cited
US1463961A
Cited
US1544843A
Cited
US1687681A
Cited
FR678640A
Cited
US1799350A
Cited
US1829187A
Cited
US1804560A
Cited
US1880692A
Cited
US2018382A
Cited
US2184619A
Cited
US2177643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |