US2429893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine attachment
Assignee: Jack & Heintz Prec Ind Inc
•
Filing: 1945-10-30
•
Granted: 1947-10-28
•
Expires: 1965-10-30
Abstract
No abstract record available.
Inventors
- 👤 Wesley E Parks
- 👤 Heckendorf Herbert
- 👤 Jr Edgar J Holzberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1457979A
Cited
US1640832A
Cited
US1783540A
Cited
US1889248A
Cited
US2118912A
Cited
US2394202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |