US2807070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for constructing prefabricated masonry walls
Assignee: Individual
•
Filing: 1954-08-02
•
Granted: 1957-09-24
•
Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Chester A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0053; B28B19/0061
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US450286A
Cited
US1518581A
Cited
US1512905A
Cited
US1809504A
Cited
US1853824A
Cited
US2046213A
Cited
US1968189A
Cited
GB557677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |