US2921504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deburring device
Assignee: National Pneumatic Co Inc
•
Filing: 1955-08-10
•
Granted: 1960-01-19
•
Expires: 1975-08-10
Abstract
No abstract record available.
Inventors
- 👤 Glingener Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:56
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/10; B23D; B23D79/00; B23D79/02; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1110396A
Cited
US1928770A
Cited
US2206450A
Cited
US2278300A
Cited
GB586193A
Cited
US2372486A
Cited
US2430375A
Cited
US2787195A
Cited
FR1092442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |