US2521941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing the vapor of a chemical agent
Assignee: Ensign Bickford Co
•
Filing: 1945-09-11
•
Granted: 1950-09-12
•
Expires: 1965-09-11
Abstract
No abstract record available.
Inventors
- 👤 David E Pearsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A VAPOR PRODUCING DEVICE OF CONTINUOUS LENGTH COMPRISING AN OXYGEN-SUFFICIENT COMBUSTIBLE POWDER, AN ACTIVE ORGANIC CHEMICAL AGENT WHICH IS CAPABLE OF AFFECTING LIVING THINGS AND WHICH IS VOLATILIZABLE AS SUCH BY HEAT, AND A CONTINUOUS SUPPORTING MEANS EXTENDING THROUGHOUT THE LENGTH OF THE DEVICE FOR HOLDING SAID POWDER AND SAID CHEMICAL AGENT IN THE FORM OF A CORD, SAID DEVICE HAVING PREDETERMINED AMOUNTS OF SAID CHEMICAL AGENT AND OF SAID COMBUSTIBLE POWDER SUBSTANTIALLY UNIFORMLY DISTRIBUTED ALONG THE LENGTH OF SAID DEVICE AND BEING SO CONSTRUCTED AND ARRANGED THAT, UPON BURNING, IT WILL RELEASE THE VAPOR OF SAID CHEMICAL AGENT IN UNIFORM AMOUNTS PER UNIT OF LENGTH OF THE DEVICE BEING BURNED.
Claim 2
Dependent Claim
111 words
A VAPOR PRODUCING DEVICE OF CONTINUOUS LENGTH COMPRISING AN OXYGEN-SUFFICIENT COMBUSTIBLE POWDER, AN ACTIVE ORGANIC CHEMICAL AGENT WHICH IS CAPABLE OF AFFECTING LIVING THINGS AND WHICH IS VOLATILIZABLE AS SUCH BY HEAT, AND A CONTINUOUS SUPPORTING MEANS EXTENDING THROUGHOUT THE LENGTH OF THE DEVICE FOR HOLDING SAID POWDER AND SAID CHEMICAL AGENT IN THE FORM OF A CORD, SAID DEVICE HAVING PREDETERMINED AMOUNTS OF SAID CHEMICAL AGENT AND OF SAID COMBUSTIBLE POWDER SUBSTANTIALLY UNIFORMLY DISTRIBUTED ALONG THE LENGTH OF SAID DEVICE AND BEING SO CONSTRUCTED AND ARRANGED THAT, UPON BURNING, IT WILL RELEASE THE VAPOR OF SAID CHEMICAL AGENT IN UNIFORM AMOUNTS PER UNIT OF LENGTH OF THE DEVICE BEING BURNED.
References Cited (Backward Citations)
US240384A
Cited
US487173A
Cited
US1162682A
Cited
US2071171A
Cited
US2127975A
Cited
US2239052A
Cited
US2239051A
Cited
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 |