US2764475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen generating candle and method of making it
Assignee: MSA Safety Inc
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Filing: 1953-09-18
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Granted: 1956-09-25
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Expires: 1973-09-18
Abstract
No abstract record available.
Inventors
- 👤 Robert M Bovard
- 👤 William C Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:31
CPC Classifications
C; C11; C11C; C11C5/00; C11C5/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN OXYGEN GENERATING CANDLE COMPRISING A BODY OF OXYGEN PRODUCING MATERIAL HAVING TOP AND BOTTOM FACES AND A SIDE WALL, A STARTING CORE OF IGNITION MATERIAL IN THE CENTRAL PORTION OF SAID BODY ADAPTED TO IGNITE THE BODY MATERIAL AROUND THE CORE, AND A BAFFLE STRIP EMBEDDED ON EDGE IN SAID BODY MATERIAL AND EXTENDING FROM ITS TOP FACE TO ITS BOTTOM FACE AND ACROSS ONE SIDE OF SAID CORE TO FORM A NARROW PATH OF BURNING BETWEEN THE SIDE OF THE BAFFLE AND THE NEAREST SIDE OF SAID BODY.
Claim 2
Dependent Claim
90 words
AN OXYGEN GENERATING CANDLE COMPRISING A BODY OF OXYGEN PRODUCING MATERIAL HAVING TOP AND BOTTOM FACES AND A SIDE WALL, A STARTING CORE OF IGNITION MATERIAL IN THE CENTRAL PORTION OF SAID BODY ADAPTED TO IGNITE THE BODY MATERIAL AROUND THE CORE, AND A BAFFLE STRIP EMBEDDED ON EDGE IN SAID BODY MATERIAL AND EXTENDING FROM ITS TOP FACE TO ITS BOTTOM FACE AND ACROSS ONE SIDE OF SAID CORE TO FORM A NARROW PATH OF BURNING BETWEEN THE SIDE OF THE BAFFLE AND THE NEAREST SIDE OF SAID BODY.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |