US3056019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: POLYOPTIC CORP
•
Filing: 1957-11-25
•
Granted: 1962-09-25
•
Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Apatoff William
- 👤 Ernest C Glasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:42
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/04; F21S; F21S10/00; F21S10/002; F21S10/06; F21V1/00; F21V1/10; G; G09; G09F; G09F13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2371172A
Cited
GB216654A
Cited
US1671071A
Cited
US1824270A
Cited
US1843897A
Cited
US1854418A
Cited
US1937138A
Cited
US1928329A
Cited
US1878750A
Cited
US1918123A
Cited
US2199308A
Cited
US2761959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |