US3272635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions containing leuco xanthene dyes and suitable activators
Assignee: Horizons Inc
•
Filing: 1963-04-17
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Granted: 1966-09-13
•
Expires: 1983-04-17
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
- 👤 John A Stewart
- 👤 James M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; Y; Y10; Y10S; Y10S204/00; Y10S204/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A COMPOSITION WHICH PRINTS OUT A VISIBLE IMAGE DIRECTLY AS A RESULT OF EXPOSURE TO VISIBLE LIGHT SAID COMPOSITION COMPRISING AN INTIMATE MIXTURE CONSISTING ESSENTIALLY OF (1) AT LEAST ONE LEUCO COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEUCO COMPOUNDS REPRESENTED BY ONE OF THE FOLLOWING GENERAL FORMULAS
Claim 2
Dependent Claim
48 words
A COMPOSITION WHICH PRINTS OUT A VISIBLE IMAGE DIRECTLY AS A RESULT OF EXPOSURE TO VISIBLE LIGHT SAID COMPOSITION COMPRISING AN INTIMATE MIXTURE CONSISTING ESSENTIALLY OF (1) AT LEAST ONE LEUCO COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEUCO COMPOUNDS REPRESENTED BY ONE OF THE FOLLOWING GENERAL FORMULAS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |