US3442646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of light scattering images in layers comprising organic photochromic materials
Assignee: Xerox Corp
•
Filing: 1965-10-01
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Granted: 1969-05-06
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Expires: 1985-10-01
Abstract
No abstract record available.
Inventors
- 👤 Alan B Amidon
- 👤 Carl Brynko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C5/00; G03C5/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3116148A
Cited
US3346385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |