US3212898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive compositions of matter comprising photochromic materials suspended in polyester binders
Assignee: Wyeth Holdings LLC
•
Filing: 1962-11-21
•
Granted: 1965-10-19
•
Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 John J Cerreta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/685; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A COMPOSITION OF MATTER COMPRISING A RESIDUAL ACID FREE POLYESTER RESIN SELECTED FROM A GROUP CONSISTING OF (1) THOSE PRODUCED FROM A SATURATED POLYCARBOXYLIC ACID AND A SATURATED POLYHYDRIC ALCOHOL AND (2) THOSE PRODUCED FROM AN A,B-ETHYLENICALLY UNSATURATED POLYCARABOXYLIC ACID, A POLYHYDRIC ALCOHOL AND A CROSS-LINKED MONOMER POSSESSING A POLYMERIZABLE CH2=C<GROUP HAVING UNIFORMLY DISPERSED THROUGHOUT THE BODY THEREOF A PHOTO CHROMIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF 1'',3'',3''-TRIMETHYL-6-NITRO-SPIRO(2H-1-BENZOPYRAN-2,2''INDOLINE), 1'', 3'', 3''-TRIMETHYL-8-NITRO-SPIRO(2H-1-BENZOPYRAN-2,2''-INDOLINE), 1'',3'',3''-TRIMETHYL-6-NITRO-8-METHOXY-SPIRO(2H-1-BENZOPYRAN-2,2''-INDOLINE), 1'',3'',3''-TRIMETHYL-5-NITRO-8-METHOXY-SPIRO(2H-1-BENZOPYRAN-2,2''INDOLINE), 1'',3'',3''-TRIMETHYL-6-CHLORO-8-NITRO-SPIRO(2H-1 BENZOPYRAN-2,2''-INDOLINE), 3''-PHENYL-6-NITRO-SPIRO(2''H,1H-BENZOPYRAN-2,2''-(2H, 1-BENZOPYRAN), AND THOSE HAVING THE FORMULA
Claim 2
Dependent Claim
83 words
A COMPOSITION OF MATTER COMPRISING A RESIDUAL ACID FREE POLYESTER RESIN SELECTED FROM A GROUP CONSISTING OF (1) THOSE PRODUCED FROM A SATURATED POLYCARBOXYLIC ACID AND A SATURATED POLYHYDRIC ALCOHOL AND (2) THOSE PRODUCED FROM AN A,B-ETHYLENICALLY UNSATURATED POLYCARABOXYLIC ACID, A POLYHYDRIC ALCOHOL AND A CROSS-LINKED MONOMER POSSESSING A POLYMERIZABLE CH2=C<GROUP HAVING UNIFORMLY DISPERSED THROUGHOUT THE BODY THEREOF A PHOTO CHROMIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF 1'',3'',3''-TRIMETHYL-6-NITRO-SPIRO(2H-1-BENZOPYRAN-2,2''INDOLINE), 1'', 3'', 3''-TRIMETHYL-8-NITRO-SPIRO(2H-1-BENZOPYRAN-2,2''-INDOLINE), 1'',3'',3''-TRIMETHYL-6-NITRO-8-METHOXY-SPIRO(2H-1-BENZOPYRAN-2,2''-INDOLINE), 1'',3'',3''-TRIMETHYL-5-NITRO-8-METHOXY-SPIRO(2H-1-BENZOPYRAN-2,2''INDOLINE), 1'',3'',3''-TRIMETHYL-6-CHLORO-8-NITRO-SPIRO(2H-1 BENZOPYRAN-2,2''-INDOLINE), 3''-PHENYL-6-NITRO-SPIRO(2''H,1H-BENZOPYRAN-2,2''-(2H, 1-BENZOPYRAN), AND THOSE HAVING THE FORMULA
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |