US2398959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum chuck for glass lathes
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1943-09-10
•
Granted: 1946-04-23
•
Expires: 1963-09-10
Abstract
No abstract record available.
Inventors
- 👤 Charles B Petry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:36
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; B25B11/007; C; C03; C03B; C03B23/00; C03B23/04; C03B23/045; Y; Y10; Y10S; Y10S409/00; Y10S409/903; Y10T; Y10T279/00; Y10T279/11
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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |