Patent US2883728A successfully refreshed from Google Patents.
US2883728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for molding concrete i-beams
Assignee: Individual
•
Filing: 1955-05-02
•
Granted: 1959-04-28
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Conrad A Sederlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:39
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/24; B28B7/241; B28B7/246
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |