Patent US2521942A successfully refreshed from Google Patents.
US2521942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for containing and dispensing heat vaporizable chemical agents
Assignee: Ensign Bickford Co
•
Filing: 1947-09-26
•
Granted: 1950-09-12
•
Expires: 1967-09-26
Abstract
No abstract record available.
Inventors
- 👤 David E Pearsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:40
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2061; A01M1/2066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AS AN ARTICLE OF MANUFACTURE, A SUBSTANTIALLY CLOSED CONTAINER OF NON-COMBUSTIBLE MATERIAL, A PREDETERMINED LENGTH OF A COMBUSTIBLE CORD-LIKE ELEMENT CONTAINING A HEAT-VAPORIZABLE ACTIVE CHEMICAL AGENT AND AN OXYGEN-SUFFICIENT COMBUSTIBLE COMPOSITION DISPOSED INSIDE SAID CONTAINER, AT LEAST ONE OPENING IN SAID CONTAINER FOR THE EMISSION OF VAPOR OF SAID CHEMICAL AGENT AND GASEOUS PRODUCTS OF COMBUSTION, MEANS OPERABLE FROM OUTSIDE SAID CONTAINER FOR INITIATING THE COMBUSTION OF SAID CORD-LIKE ELEMENT, AND MEANS DISPOSED BETWEEN SAID OPENING FROM SAID CONTAINER AND SAID BURNING ZONE FOR PREVENTING SOLID PARTICLES RESULTING FROM THE COMBUSTION OF SAID CORD-LIKE ELEMENT FROM PASSING OUT OF SAID CONTAINER.
Claim 2
Dependent Claim
101 words
AS AN ARTICLE OF MANUFACTURE, A SUBSTANTIALLY CLOSED CONTAINER OF NON-COMBUSTIBLE MATERIAL, A PREDETERMINED LENGTH OF A COMBUSTIBLE CORD-LIKE ELEMENT CONTAINING A HEAT-VAPORIZABLE ACTIVE CHEMICAL AGENT AND AN OXYGEN-SUFFICIENT COMBUSTIBLE COMPOSITION DISPOSED INSIDE SAID CONTAINER, AT LEAST ONE OPENING IN SAID CONTAINER FOR THE EMISSION OF VAPOR OF SAID CHEMICAL AGENT AND GASEOUS PRODUCTS OF COMBUSTION, MEANS OPERABLE FROM OUTSIDE SAID CONTAINER FOR INITIATING THE COMBUSTION OF SAID CORD-LIKE ELEMENT, AND MEANS DISPOSED BETWEEN SAID OPENING FROM SAID CONTAINER AND SAID BURNING ZONE FOR PREVENTING SOLID PARTICLES RESULTING FROM THE COMBUSTION OF SAID CORD-LIKE ELEMENT FROM PASSING OUT OF SAID CONTAINER.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |