US3477274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential thermal analysis method and means employing high frequency heating
Assignee: CHARLES C WINDING
•
Filing: 1966-10-18
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Granted: 1969-11-11
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Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Wald
- 👤 Charles C Winding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |