Free radical photographic system containing a pyrylium dye former
Abstract
Abstract WHEREIN: R1 REPRESENTS AN ALIPHATIC GROUP, AN ARYL GROUP, OR REPRESENTS TOGETHER WITH R'' THE NECESSARY ATOMS TO CLOSE A HOMOCYCLIC RING, R'' REPRESENTS HYDROGEN, A C1-C5 ALKYL GROUP, A PHENYL GROUP, OR A PHENOXY GROUP, Z1 REPRESENTS THE NECESSARY ATOMS TO CLOSE A HOMOCYCLIC RING OR RING SYSTEM. Z2 REPRESENTS THE NECESSARY ATOMS TO CLOSE A HOMOCYCLIC NUCLEUS, R2 REPRESENTS A C1-C5 ALKYL GROUP, AND N REPRESENTS 1 OR 2. 2-R2,5,6-(-Z2-)-2H-PYRAN-2-OL R1-(CO)(N-1)-C(-R'')=CH-C<(=C(-OH)-Z1-) AND A PHOTOGRAPHIC PROCESS WHEREIN A VISIBLE IMAGE IS FORMED BY IMAGE-WISE EXPOSURE TO ACTIVE ELECTROMAGNETIC RADIATION OF A RECORDING MATERIAL WHICH COMPRISES IN INTIMATE ADMIXTURE: (1) AT LEAST ONE ORGANIC POLYHALOGEN COMPOUND OF WHICH A HALOGEN CONTAINING RADICAL CAN BE SEPARATED PHOTOLYTICALLY, AND (2) AT LEAST ONE COLOUR FORMING COMPOUND CORRESPONDING TO ONE OF THE FOLLOWING GENERAL FORMULAE:
Inventors
- 👤 U Laridon
- 👤 Den Houte J Van
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |