US3691085A
Expired / Lapsed
US
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Method of controlling the lifetime of oxalate ester chemiluminescent reactions
Assignee: Wyeth Holdings LLC
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Filing: 1970-07-13
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Granted: 1972-09-12
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Expires: 1990-07-13
Abstract
Abstract A novel chemiluminescent composition which incorporates at least one of a newly discovered group of materials which extend the lifetime during which an oxalic ester chemiluminescent reaction produces chemiluminescent light. The lifetime extender materials are inorganic and organic acids which have a pKa below about 5.0 in aqueous solution. Also useful are sulfates of lithium and metals from Groups 2a, 2b, and 3a of the Periodic Table, chlorides of Group 2a metals, silica, and acidic ion exchange resins.
Inventors
- 👤 Bernard Roberts
- 👤 Michael Mckay Rauhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
23 words
The composition of claim 1 wherein said lifetime extender is an acid, the negative log of the pka thereof being below about 3.2.
Claim 2
Dependent Claim
15 words
sulfates of lithium and metals of Groups 2a, 2b, and 3a of the Periodic Table;
Claim 3
Dependent Claim
10 words
chlorides of metals of Groups 2a of the Periodic Table;
Claim 4
Dependent Claim
20 words
A component according to claim 1, in which said ester is one with a Hammett sigma constant greater than 0.
Claim 5
Dependent Claim
12 words
A composition according to claim 3 where the hydroperoxide is hydrogen peroxide.
Claim 6
Dependent Claim
2 words
silica; and
Claim 7
Dependent Claim
75 words
acidic ion exchange resins; (2) an ester represented by the formula: where R1 and R11 are each selected from the group consisting of aryl groups, heterocyclic groups, and unsaturated alkyl groups having vinyl unsaturation, and n is a number at least 1, (3) an organic fluorescent compound, and (4) an organic solvent, said composition being intended to be reacted with a hydroperoxide, the proportions being such as to obtAin a chemiluminescent emission of improved lifetime.
Claim 8
Dependent Claim
12 words
A composition according to claim 3 in which said ester is bis(2,4,6-trichlorophenyl)oxylate.
Claim 9
Dependent Claim
32 words
A composition according to claim 4 in which the lifetime extender agent comprises oxalic acid, in which the aryl oxalic ester comprises bis(2,4-dinitrophenyl) oxalate, and in which the fluorescent compound comprises rubrene.
Claim 10
Dependent Claim
14 words
A composition according to claim 4 wherein said lifetime extender agent is magnesium sulfate.
Claim 11
Dependent Claim
13 words
A composition according to claim 4 wherein said lifetime extender agent is silica.
Claim 12
Dependent Claim
11 words
A composition according to claim 4 comprising in addition a base.
Claim 13
Dependent Claim
45 words
A chemiluminescent process for obtaining increased light lifetime comprising reacting together the ingredients of a composition according to Claim 1; said ingredients comprising said ester, a hydroperoxide, at least one organic fluorescent compound, and an organic solvent, in the presence of said lifetime extender agent.
Claim 14
Dependent Claim
49 words
A process according to claim 10 in which said lifetime extender agent comprises oxalic acid, in which said fluorescent compound comprises rubrene, in which said ester comprises an electronegatively substituted aryl oxalate ester, in which said organic solvent comprises dimethyl phthalate, and in which said hydroperoxide comprises hydrogen peroxide.
References Cited (Backward Citations)
US2420286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |