US2503494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete wall form
Assignee: Individual
•
Filing: 1947-03-21
•
Granted: 1950-04-11
•
Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:22
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/065; E04G17/0651; E04G17/0652
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US958419A
Cited
US1619321A
Cited
US1575931A
Cited
US1730533A
Cited
US1658681A
Cited
US1851339A
Cited
US1901392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |