US4042294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminated electro-optical display apparatus
Assignee: Micro Display Systems Inc
•
Filing: 1976-03-17
•
Granted: 1977-08-16
•
Expires: 1996-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Lawrence A Billings
- 👤 Daniel E Evanicky
- 👤 V Joseph Hull
- 👤 Charles V Ristagno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133615; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/005; G02B6/0051; G02F1/133602; G02F1/133606; G02B6/0055; G02F1/133626; Y; Y10; Y10S; Y10S428/00; Y10S428/918; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31855; Y10T428/31938
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |