US2778219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact tester for brittle materials
Assignee: Individual
•
Filing: 1954-12-15
•
Granted: 1957-01-22
•
Expires: 1974-12-15
Abstract
No abstract record available.
Inventors
- 👤 William J Wachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:58
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/30; G01N2203/00; G01N2203/003; G01N2203/0032; G01N2203/0039; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/027
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |