Patent US4564313B1 successfully refreshed from Google Patents.
US4564313B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4564313B1 - - Google Patents
Assignee: HY-SPAN SYSTEM Inc
•
Filing: 1983-09-29
•
Granted: 1989-03-07
•
Expires: 2003-09-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:56
CPC Classifications
E; E01; E01F; E01F5/00; E01F5/005; E01D; E01D1/00; E01D2101/00; E01D2101/20; E01D2101/24; E01D2101/26
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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |