Patent US2977320A successfully refreshed from Google Patents.
US2977320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous writing
Assignee: Individual
•
Filing: 1957-01-07
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Granted: 1961-03-28
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Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Lloyd T Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:46
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; B; B43; B43K; B43K7/00; C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A METHOD OF WRITING IN THE DARK WHICH COMPRISES, SUPPLYING A LIQUID CONTAINING A REACTIVE COMPONENT WHICH WHEN OXIDIZED PRODUCES CHEMILUMINESCENT LIGHT TO A WRITING SURFACE FORMED ON AN OBJECT FROM A SOURCE DISSOCIATED WITH SAID OBJECT IN SUCH MANNER AS TO FORM WRITING CHARACTERS ON SAID SURFACE, AND CONTACTING SAID LIQUID WITH AN OXIDIZING AGENT, WHEREBY SAID LIQUID AND SAID AGENT REACT TOGETHER TO PRODUCE VISIBLE LIGHT COINCIDENT WITH SAID WRITING CHARACTERS.
Claim 2
Independent Claim
73 words
A METHOD OF WRITING IN THE DARK WHICH COMPRISES, SUPPLYING A LIQUID CONTAINING A REACTIVE COMPONENT WHICH WHEN OXIDIZED PRODUCES CHEMILUMINESCENT LIGHT TO A WRITING SURFACE FORMED ON AN OBJECT FROM A SOURCE DISSOCIATED WITH SAID OBJECT IN SUCH MANNER AS TO FORM WRITING CHARACTERS ON SAID SURFACE, AND CONTACTING SAID LIQUID WITH AN OXIDIZING AGENT, WHEREBY SAID LIQUID AND SAID AGENT REACT TOGETHER TO PRODUCE VISIBLE LIGHT COINCIDENT WITH SAID WRITING CHARACTERS.
Claim 3
Dependent Claim
34 words
THE METHOD ACCORDING TO CLAIM 1 IN WHICH SAID LIQUID CONSISTS ESSENTIALLY OF AN ALKALINE SOLUTION OF AN AMINOPHTHALHYDRAZIDE, AND SAID OXIDIZING AGENT CONSISTS ESSENTIALLY OF A SOLUTION OF HYDROGEN PEROXIDE CONTAINING POTASSIUM FERRICYANIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |