US3948797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for restoration of performance of a chemical light system
Assignee: Wyeth Holdings LLC
•
Filing: 1973-11-29
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Granted: 1976-04-06
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Expires: 1993-11-29
Abstract
Abstract A process for the restoration of the initial chemical lighting potential of a chemiluminescent lighting system. More particularly, a process for the restoration of the chemical lighting potential of a two component chemiluminescent lighting system.
Inventors
- 👤 Mary-Louise Vega
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:15
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
A process for the rejuvenation of an oxalate component of a chemical lighting system, said oxalate component comprising an oxalic acid diester and a fluorescer in organic liquid solvent, which process comprises mixing the oxalate component with a molecular sieve and then separating the treated component therefrom.
Claim 2
Dependent Claim
47 words
A process for the rejuvenation of an oxalate component of a chemical lighting system, said oxalate component comprising an oxalic acid diester and a fluorescer in organic liquid solvent, which process comprises mixing the oxalate component with a molecular sieve and then separating the treated component therefrom.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the molecular sieve is Type 5A molecular sieve.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein the amount of molecular sieve used ranges from less than about 10%, on the weight of the oxalate component.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein the amount of molecular sieve is from about 1 to 5%, on the weight of the oxalate component.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |