Patent US2384578A successfully refreshed from Google Patents.
US2384578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical element
Assignee: Bausch and Lomb Inc
•
Filing: 1943-03-10
•
Granted: 1945-09-11
•
Expires: 1963-03-10
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/04; C23C14/042; C23C14/044; C03; C03C; C03C17/00; C03C17/06; C03C17/09; G; G02; G02B; G02B3/00
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) | 1948-09-10 | 1949-03-12 | 1949-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-09-10 | 1953-03-12 | 1953-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-09-10 | 1957-03-12 | 1957-09-11 | $7700.00 | Window Closed / Lapsed |