US3871823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for inhibiting the corrosion of metallic surfaces
Assignee: Individual
•
Filing: 1971-06-03
•
Granted: 1975-03-18
•
Expires: 1991-06-03
Abstract
Abstract A tubular housing having an enclosed end with a hexagonal head thereon and external threads at the other end for threadedly engaging the housing into the spark plug receiving opening in an engine. The housing contains a mixture of organic amonium nitrites with varying vapor pressures, a buffer system to neutralize lead acids and an anti-oxidant for removing varnish and/or preventing the formation thereof.
Inventors
- 👤 John D Skildum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:09
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/04; C; C23; C23F; C23F11/00; C23F11/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A METHOD OF INHIBITING THE CORROSION OF THE INTERNAL METALLIC SURFACES OF AN APPARATUS COMPRISING THE STEPS OF: A. PROVIDING A HOUSING DEFINING A CAVITY THEREIN; B. PLACING A MIXTURE OF ORGANIC AMMONIUM NITRITES WITH VARYING VAPOR PRESSURES WITHIN SAID CAVITY; C. PLACING WITHIN SAID CAVITY A CHEMICAL BUFFER SYSTEM FOR NEUTRALIZING LEAD ACIDS; D, PLACING SAID HOUSING WITHIN THE APPARATUS TO BE PROTECTED; AND, E. WHEREBY SAID INTERNAL SURFACES ARE EXPOSED TO AND CONTACTED BY THE ORGANIC NITRITES AND CHEMICAL BUFFER SYSTEM WITHIN SAID CAVITY.
Claim 2
Independent Claim
86 words
A METHOD OF INHIBITING THE CORROSION OF THE INTERNAL METALLIC SURFACES OF AN APPARATUS COMPRISING THE STEPS OF: A. PROVIDING A HOUSING DEFINING A CAVITY THEREIN; B. PLACING A MIXTURE OF ORGANIC AMMONIUM NITRITES WITH VARYING VAPOR PRESSURES WITHIN SAID CAVITY; C. PLACING WITHIN SAID CAVITY A CHEMICAL BUFFER SYSTEM FOR NEUTRALIZING LEAD ACIDS; D, PLACING SAID HOUSING WITHIN THE APPARATUS TO BE PROTECTED; AND, E. WHEREBY SAID INTERNAL SURFACES ARE EXPOSED TO AND CONTACTED BY THE ORGANIC NITRITES AND CHEMICAL BUFFER SYSTEM WITHIN SAID CAVITY.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said chemical buffer system includes sodium tetraborate dissolved in a high terpin solvent.
Claim 4
Dependent Claim
33 words
The method of claim 1 further including the step of placing within said cavity any of a class of volatile anti-oxidents for preventing the formation of varnish and scavenging oxygen from varnish deposits.
Claim 5
Independent Claim
144 words
A device for protecting engines during storage comprising: a. an elongated tubular housing having one end closed and adapted to receive a tool in engagement therewith, and the other end being open and haviNg external threads formed proximate said opening; b. the opening in said housing being partially filled with a first layer of material including a buffer system for neutralizing lead acids in an engine and any of a class of anti-oxidants for preventing the formation of varnish and scavenging oxygen from varnish deposits to render them volatile; c. the opening in said housing being partially filled with a second layer of material including a mixture of organic ammonium nitrites with varying vapor pressures; and d. said first and second layers of material being held in position by a layer of ester sponge having low molecular weight organic ammonium nitrite chemically reacted therein.
Claim 6
Independent Claim
144 words
A device for protecting engines during storage comprising: a. an elongated tubular housing having one end closed and adapted to receive a tool in engagement therewith, and the other end being open and haviNg external threads formed proximate said opening; b. the opening in said housing being partially filled with a first layer of material including a buffer system for neutralizing lead acids in an engine and any of a class of anti-oxidants for preventing the formation of varnish and scavenging oxygen from varnish deposits to render them volatile; c. the opening in said housing being partially filled with a second layer of material including a mixture of organic ammonium nitrites with varying vapor pressures; and d. said first and second layers of material being held in position by a layer of ester sponge having low molecular weight organic ammonium nitrite chemically reacted therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |