US5439291C1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for ac differential thermal analysis
Assignee: Waters Technologies Corp
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Filing: 1993-12-22
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Granted: 2002-04-16
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Expires: 2013-12-22
Abstract
No abstract record available.
Inventors
- 👤 Michael Reading
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:02
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; G01N25/4806; G01N25/4826; G01N25/4833; B; B82; B82Y; B82Y15/00; G01N25/18; G01N25/4846; G01N25/4866
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) | 2005-04-15 | 2005-10-15 | 2006-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-15 | 2009-10-15 | 2010-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-15 | 2013-10-15 | 2014-04-16 | $7700.00 | Window Closed / Lapsed |