Patent US2781877A successfully refreshed from Google Patents.
US2781877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building material
Assignee: CECO STEEL PRODUCTS CORP
•
Filing: 1955-01-31
•
Granted: 1957-02-19
•
Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Ned A Ochiltree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:05
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; B; B21; B21D; B21D13/00; B21D13/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US184897A
Cited
US901963A
Cited
US1065449A
Cited
US1226477A
Cited
US1848076A
Cited
US2007374A
Cited
US2038437A
Cited
US2217110A
Cited
US2369487A
Cited
US2630892A
Cited
US2594131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |