US2701429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for grinding conical surfaces
Assignee: Individual
•
Filing: 1952-09-08
•
Granted: 1955-02-08
•
Expires: 1972-09-08
Abstract
No abstract record available.
Inventors
- 👤 Hartridge Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:08
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1421205A
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US1452508A
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US1531281A
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US1909446A
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US2121730A
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US2247994A
Cited
US2398250A
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US2363448A
Cited
US2607244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |