US4420909B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4420909B1 - - Google Patents
Assignee: Accretech USA Inc
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Filing: 1981-11-10
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Granted: 1989-11-14
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Expires: 2001-11-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
B; B28; B28D; B28D5/00; B28D5/0058; B28D5/0082; B28D5/0094; B23; B23Q; B23Q7/00; B23Q7/04; B23Q7/047; B28D5/02; B28D5/022; B28D5/028
Claims Analysis
Total Claims: 0
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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) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |