US2921492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable metal slotting saw
Assignee: Northrop Grumman Corp
•
Filing: 1956-03-26
•
Granted: 1960-01-19
•
Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Robert N Worth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:09
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/16; B23Q; B23Q9/00; B23Q9/0014; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306216; Y10T409/306384; Y10T409/306664; Y10T409/30672; Y10T74/00; Y10T74/19; Y10T74/19614; Y10T74/19642; Y10T74/19679; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/0333; Y10T83/0348; Y10T83/0385; Y10T83/0393; Y10T83/667; Y10T83/68; Y10T83/768; Y10T83/7684; Y10T83/7693; Y10T83/7722; Y10T83/7726; Y10T83/7755; Y10T83/7763; Y10T83/7776; Y10T83/778
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) | 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 |