US4287090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating flue deposits and composition therefor
Assignee: Individual
•
Filing: 1979-07-30
•
Granted: 1981-09-01
•
Expires: 1999-07-30
Abstract
Abstract A water solution of a mixture of catalytically-active metal salts comprising manganous acetate, calcium nitrate and cupric acetate is sprayed or "misted" into and on a burning wood fire and the walls of the firebox whereby the active agents are carried up and onto the flue walls to effect reduction and/or removal of tars, creosote and other wood-burning by-products deposited on the firebox and flue walls.
Inventors
- 👤 William C. Pfefferle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:31
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
An aqueous catalytic solution for removing tar deposits by spraying the solution into a firebox and its flue during or immediately following normal use of the firebox comprising a solution containing at least 10 grams of a water soluble salt of manganese and at least 5 grams of at least one additional water soluble salt selected from the group consisting of water soluble copper salts and water soluble calcium salts dissolved in a liter of water.
Claim 2
Dependent Claim
76 words
An aqueous catalytic solution for removing tar deposits by spraying the solution into a firebox and its flue during or immediately following normal use of the firebox comprising a solution containing at least 10 grams of a water soluble salt of manganese and at least 5 grams of at least one additional water soluble salt selected from the group consisting of water soluble copper salts and water soluble calcium salts dissolved in a liter of water.
Claim 3
Dependent Claim
43 words
The aqueous catalytic solution of claim 1 wherein said solution includes at least 10 grams of a water soluble salt of manganese, at least 5 grams of a water soluble copper salt, and at least 5 grams of a water soluble calcium salt.
Claim 4
Dependent Claim
36 words
The aqueous catalytic solution as set forth in claim 1 wherein said solution contains at least 20 grams of manganese acetate, at least 10 grams of calcium nitrate, and at least 5 grams of copper acetate.
References Cited (Backward Citations)
US3684576A
Cited
US3598650A
Cited
US4092370A
Cited
US3800466A
Cited
US4053533A
Cited
US4049790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |