Patent US2953835A successfully refreshed from Google Patents.
US2953835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corner former for poured concrete
Assignee: ARMSTRONG
•
Filing: 1956-10-17
•
Granted: 1960-09-27
•
Expires: 1976-10-17
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Harris
- 👤 Jacob Van Dyke
- 👤 Theodore N Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:55
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0002; B28B7/0011; B28B7/0064; B28B7/0085; E; E04; E04G; E04G17/00; E04G17/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1129658A
Cited
US1807315A
Cited
US1846196A
Cited
US2185860A
Cited
US2227581A
Cited
US2281133A
Cited
US2495100A
Cited
US2453223A
Cited
US2593456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |