US1429481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardness-testing machine
Assignee: HYATT ROLLER BEARING CO
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Filing: 1921-03-31
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Granted: 1922-09-19
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Expires: 1941-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph G Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:04
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
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) | 1925-09-18 | 1926-03-20 | 1926-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-09-18 | 1930-03-20 | 1930-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-09-18 | 1934-03-20 | 1934-09-19 | $7700.00 | Window Closed / Lapsed |