Patent US3550898A successfully refreshed from Google Patents.
US3550898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete wall forms
Assignee: TRU WALL CONCRETE FORMING Ltd
•
Filing: 1969-01-06
•
Granted: 1970-12-29
•
Expires: 1989-01-06
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Ursini
- 👤 Joseph J Citrullo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/04; E04G17/045
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |