US5278035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-toxic photographic developer composition for processing x-ray films in automatic film processors
Assignee: AUDENREID W KNAPP JR
•
Filing: 1991-04-12
•
Granted: 1994-01-11
•
Expires: 2011-04-12
Abstract
Abstract A non-hydroquinone and non-alkali metal hydroxide containing developer composition for radiographic materials and a method of use thereof are provided. The developer composition comprises a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, a 3-pyrazolidone compound, and an anti-swelling agent selected from the group consisting of sodium sulfate, glutaraldehyde or mixtures thereof, said composition having a pH of from 9.5 to 10.6, and said developer being present in an amount of at least about 15 grams, said sulfite being present in an amount of from 2 to 50 grams, said swelling control agent being present in an amount of from 35 to 90 grams, and water to 1.0 liter.
Inventors
- 👤 Audenried W. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/30; G03C5/264; G03C5/265
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
121 words
A non-hydroquinone and non-alkali metal hydroxide containing developer composition for radiographic materials comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, a 3-pyrazolidone compound, and an anti-swelling agent selected from the group consisting of sodium sulfate, glutaraldehyde or mixtures thereof, said composition having a pH of from 9.5 to 10.6, said developer being present in an amount of at least about 15 grams, said sulfite being present in an amount of from 2 to 50 grams, said swelling control agent being present in an amount of from 35 to 90 grams, and water to 1.0 liter.
Claim 2
Dependent Claim
121 words
A non-hydroquinone and non-alkali metal hydroxide containing developer composition for radiographic materials comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, a 3-pyrazolidone compound, and an anti-swelling agent selected from the group consisting of sodium sulfate, glutaraldehyde or mixtures thereof, said composition having a pH of from 9.5 to 10.6, said developer being present in an amount of at least about 15 grams, said sulfite being present in an amount of from 2 to 50 grams, said swelling control agent being present in an amount of from 35 to 90 grams, and water to 1.0 liter.
Claim 3
Dependent Claim
45 words
The developer composition of claim 1 wherein said developer is selected from the group consisting of ascorbic acid, erythroascorbic acid, 1-glucosascorbic acid, 1-rhamnoascorbic acid, 1-fucoascorbic acid, d-glucoheptoascorbic acid, sorboascorbic acid, ω-lactoascorbic acid, maltoascorbic acid, 1-araboascorbic acid, 1-glucoascorbic acid, d-galactoascorbic acid, 1-guloascorbic acid, and 1-alloascorbic acid.
Claim 4
Dependent Claim
14 words
The developer composition of claim 1 wherein said developer comprises an alkaline metal salt.
Claim 5
Dependent Claim
23 words
The developer composition of claim 1 wherein said developer is selected from the group consisting of ascorbic and erythorbic acids and salts thereof.
Claim 6
Dependent Claim
45 words
The developer composition of claim 4 wherein said developer is selected from the group consisting of (1) ascorbic acid or erythorbic acid, either singly or in admixture, together with at least one salt thereof, and (2) at least one salt of ascorbic or erythorbic acid.
Claim 7
Dependent Claim
12 words
The photographic developer of claim 1 wherein said developer is potassium erythorbate.
Claim 8
Dependent Claim
12 words
The photographic developer of claim 1 wherein said developer is sodium erythorbate.
Claim 9
Dependent Claim
18 words
The photographic developer of claim 1 wherein said developer is a mixture of sodium erythorbate and erythorbic acid.
Claim 10
Dependent Claim
25 words
The photographic developer of claim 1 further comprising a component selected from the group consisting of a sequestering agent, an anti-fogging agent, and mixtures thereof.
Claim 11
Dependent Claim
20 words
The photographic developer of claim 1 wherein said sulfite is selected from the group consisting of sodium and potassium sulfite.
Claim 12
Dependent Claim
12 words
The photographic developer composition of claim 1 further comprising a sequestering agent.
Claim 13
Dependent Claim
14 words
The photographic developer composition of claim 1 wherein said anti-swelling agent comprises sodium sulfate.
Claim 14
Dependent Claim
24 words
The photographic developer composition of claim 1 wherein said 3-pyrazolidone compound is selected from the group consisting of 1-phenyl-3-pyrazolidone, 1-p-tolyl-3-pyrazolidone, 1-phenyl-4-methyl-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, and 1-p-chlorophenyl-3-pyrazolidone.
Claim 15
Dependent Claim
22 words
The photographic developer composition of claim 1 wherein said developer composition comprises 4-(hydroxymethyl)-4-methyl-1-phenyl-3-pyrazolidone, benzotriazole, 1-phenyl-5-mercaptotetrazole, potassium carbonate, sodium bromide, and sodium sulfite.
Claim 16
Dependent Claim
11 words
The photographic developer composition of claim 11 comprising Na 4 EDTA.
Claim 17
Dependent Claim
14 words
The photographic developer composition of claim 1 wherein said developer has the formula ##STR4##
Claim 18
Dependent Claim
14 words
The photographic developer composition of claim 1 wherein said developer has the formula ##STR5##
Claim 19
Independent Claim
138 words
A method of effecting development of an image-wise exposed radiographic material comprising effecting development of said material while in contact with a non-hydroquinone and non-alkali metal hydroxide containing aqueous development medium comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, a 3-pyrazolidone compound and an anti-swelling agent selected from the group consisting of sodium sulfate and glutaraldehyde, said composition having a pH of from 9.50 to 10.6, said developer being present in an amount of at least about 15 grams, said sulfite being present in an amount of from 2 to 50 grams, said swelling control agent being present in an amount of from 35 to 90 grams, and water to 1.0 liter.
Claim 20
Independent Claim
138 words
A method of effecting development of an image-wise exposed radiographic material comprising effecting development of said material while in contact with a non-hydroquinone and non-alkali metal hydroxide containing aqueous development medium comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, a 3-pyrazolidone compound and an anti-swelling agent selected from the group consisting of sodium sulfate and glutaraldehyde, said composition having a pH of from 9.50 to 10.6, said developer being present in an amount of at least about 15 grams, said sulfite being present in an amount of from 2 to 50 grams, said swelling control agent being present in an amount of from 35 to 90 grams, and water to 1.0 liter.
Claim 21
Dependent Claim
44 words
The method of claim 18 wherein said developer is selected from the group consisting of ascorbic acid, erythroascorbic acid, 1-glucosascorbic acid, 1-rhamnoascorbic acid, 1-fucoascorbic acid, d-glucoheptoascorbic acid, sorboascorbic acid, ω-lactoascorbic acid, maltoascorbic acid, 1-araboascorbic acid, 1-glucoascorbic acid, d-galactoascorbic acid, 1-guloascorbic acid, and 1-alloascorbic acid.
Claim 22
Dependent Claim
13 words
The method of claim 18 wherein said developer comprises an alkaline metal salt.
Claim 23
Dependent Claim
22 words
The method of claim 18 wherein said developer is selected from the group consisting of ascorbic and erythorbic acids and salts thereof.
Claim 24
Dependent Claim
44 words
The method of claim 21 wherein said developer is selected from the group consisting of (1) ascorbic acid or erythorbic acid, either singly or in admixture, together with at least one salt thereof, and (2) at least one salt of ascorbic or erythorbic acid.
Claim 25
Dependent Claim
11 words
The method of claim 18 wherein said developer is potassium erythorbate.
Claim 26
Dependent Claim
11 words
The method of claim 18 wherein said developer is sodium erythorbate.
Claim 27
Dependent Claim
17 words
The method of claim 18 wherein said developer is a mixture of sodium erythorbate and erythorbic acid.
Claim 28
Dependent Claim
24 words
The method of claim 18 further comprising a component selected from the group consisting of a sequestering agent, an anti-fogging agent, and mixtures thereof.
Claim 29
Dependent Claim
19 words
The method of claim 18 wherein said sulfite is selected from the group consisting of sodium and potassium sulfite.
Claim 30
Dependent Claim
9 words
The method claim 18 further comprising a sequestering agent.
Claim 31
Dependent Claim
12 words
The method of claim 18 wherein said anti-swelling agent comprises sodium sulfate.
Claim 32
Dependent Claim
22 words
The method of claim 18 wherein said 3-pyrazolidone compound is selected from the group consisting of 1-phenyl-3-pyrazolidone, 1-p-tolyl-3-pyrazolidone, 1-phenyl-4-methyl-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, and 1-p-chlorophenyl-3-pyrazolidone.
Claim 33
Dependent Claim
21 words
The method of claim 18 wherein said developer composition comprises 4-(hydroxymethyl)-4-methyl-1-phenyl-3-pyrazolidone, benzotriazole, 1-phenyl-5-mercaptotetrazole, potassium carbonate, and sodium bromide, and sodium sulfite.
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) | 1997-01-10 | 1997-07-12 | 1998-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-10 | 2001-07-12 | 2002-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-10 | 2005-07-12 | 2006-01-11 | $7700.00 | Window Closed / Lapsed |