US4420909B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wafering system
Assignee: Accretech USA Inc
•
Filing: 1981-11-10
•
Granted: 1997-06-10
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Expires: 2001-11-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Steere Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:44
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) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |