US2408512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for forming slits
Assignee: American Optical Corp
•
Filing: 1942-12-30
•
Granted: 1946-10-01
•
Expires: 1962-12-30
Abstract
No abstract record available.
Inventors
- 👤 Albin A Gradisar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/21; Y10T74/2142; Y10T74/2144
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-30 | 1950-04-01 | 1950-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-30 | 1954-04-01 | 1954-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-30 | 1958-04-01 | 1958-10-01 | $7700.00 | Window Closed / Lapsed |