Patent US2993008A successfully refreshed from Google Patents.
US2993008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture indicator for photoflash lamp
Assignee: General Electric Co
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Filing: 1958-05-21
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Granted: 1961-07-18
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert M Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:56
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02; Y; Y10; Y10S; Y10S436/00; Y10S436/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A MOISTURE INDICATING MATERIAL FOR INCLUSION IN THE ENVELOPE OF A LAMP TO INDICATE BY CHANGE IN COLORATION THE PRESENCE OF AIR THEREIN, SAID INDICATING MATERIAL BEING COMPOSED OF A MIXTURE CONSISTING SUBSTANTIALLY OF COBALTOUS-COBALTIC CYANIDE AND 5-80% BY WEIGHT OF A BINDER OF BARIUM CHLORIDE.
Claim 2
Dependent Claim
46 words
A MOISTURE INDICATING MATERIAL FOR INCLUSION IN THE ENVELOPE OF A LAMP TO INDICATE BY CHANGE IN COLORATION THE PRESENCE OF AIR THEREIN, SAID INDICATING MATERIAL BEING COMPOSED OF A MIXTURE CONSISTING SUBSTANTIALLY OF COBALTOUS-COBALTIC CYANIDE AND 5-80% BY WEIGHT OF A BINDER OF BARIUM CHLORIDE.
References Cited (Backward Citations)
US1793143A
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US2237374A
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US2520993A
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US2726527A
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GB740315A
Cited
US2787149A
Cited
US2845394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |