US2784534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal grinding machines
Assignee: Heald Machine Co
•
Filing: 1953-07-20
•
Granted: 1957-03-12
•
Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Almon F Townsend
- 👤 Harold L Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/06; B24B41/061; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/545; B24B5/00; B24B5/18; B24B5/185; Y; Y10; Y10T; Y10T29/00; Y10T29/44
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |