US2917874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1958-08-25
•
Granted: 1959-12-22
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Kurt F Lierse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:04
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/02; B24B47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US310861A
Cited
US2837975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |