US3454822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for generating shadows on continuous surfaces in an image produced by an electronic image generator
Assignee: Individual
•
Filing: 1968-01-15
•
Granted: 1969-07-08
•
Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lee Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3364382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |