Patent US3618784A successfully refreshed from Google Patents.
US3618784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rust-inhibiting oil filter element
Assignee: Texaco Inc
•
Filing: 1969-01-08
•
Granted: 1971-11-09
•
Expires: 1989-01-08
Abstract
Abstract An oil filter suitable for use in the lubricating oil system of an internal combustion engine, the oil filter element of which has an adherent oxygenated boron derivative. The oxygenated boron derivative can be boric acid and/or any of its dehydration products, salts or esters. The methods of dispersing the oxygenated boron derivative in the oil filter element include (1) accelerating the oxygenated boron derivative toward the oil filter element by maintaining a pressure differential across the oil filter element; (2) sandwiching the oxygenated boron derivative between two layers of oil filter element material; (3) making a solution of the oxygenated boron derivative in a liquid vehicle, soaking the oil filter material with the solution and volatilizing the liquid vehicle from the oil filter element.
Inventors
- 👤 Walter W Hellmuth
- 👤 Raymond C Schlight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:16
CPC Classifications
C; C10; C10M; C10M177/00; B; B01; B01D; B01D36/00; B01D36/003; B01D39/00; B01D39/14; C10M2201/00; C10M2201/087; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/028; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
87 words
An oil filter suitable for use in the lubricating oil system of an internal combustion engine, said oil filter comprising a closed housing having at least one inlet port and an outlet port, an oil filter element in said housing disposed between said inlet port and said outlet port, and an oxygenated boron derivative dispersed through said oil filter element whereby polar materials present in lubricating oil passed through said oil filter element will leach oxygenated boron derivative to provide a rust inhibitor in said lubricating oil.
Claim 2
Dependent Claim
87 words
An oil filter suitable for use in the lubricating oil system of an internal combustion engine, said oil filter comprising a closed housing having at least one inlet port and an outlet port, an oil filter element in said housing disposed between said inlet port and said outlet port, and an oxygenated boron derivative dispersed through said oil filter element whereby polar materials present in lubricating oil passed through said oil filter element will leach oxygenated boron derivative to provide a rust inhibitor in said lubricating oil.
Claim 3
Dependent Claim
16 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is boric acid.
Claim 4
Dependent Claim
20 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is a dehydration product of boric acid.
Claim 5
Dependent Claim
19 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is a salt of boric acid.
Claim 6
Dependent Claim
19 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is an ester of boric acid.
Claim 7
Dependent Claim
45 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is a mixture of two or more of the oxygenated boron derivatives of boric acid, a dehydration product of boric acid, a salt of boric acid and an ester of boric acid.
Claim 8
Dependent Claim
39 words
An oil filter as described in claim 1, wherein the oxygenated boron derivative is selected from the group consisting of boric acid, a dehydration product of boric acid, a salt of boric acid, and an ester of boric acid.
Claim 9
Dependent Claim
42 words
An oil filter element in accordance with claim 1, wherein the percent by weight of said boron dispersed through said oil filter element is between 0.001 percent and 1.000 percent of said lubricating oil to be cycled and recycled through said filter.
Claim 10
Dependent Claim
20 words
An oil filter element in accordance with claim 1, wherein said oil filter element is fabricated from a permeable material.
Claim 11
Dependent Claim
15 words
An oil filter element in accordance with claim 9, wherein said permeable material is paper.
Claim 12
Dependent Claim
14 words
An oil filter element in accordance with claIm 10, wherein said paper is pleated.
Claim 13
Dependent Claim
15 words
An oil filter element in accordance with claim 9, wherein said permeable material is cotton.
Claim 14
Dependent Claim
15 words
An oil filter element in accordance with claim 9, wherein said permeable material is cloth.
Claim 15
Dependent Claim
15 words
An oil filter element in accordance with claim 9, wherein said permeable material is silk.
Claim 16
Dependent Claim
25 words
An oil filter element in accordance with claim 9, wherein said oxygenated boron derivative is dispersed throughout the external surface of said oil filter element.
Claim 17
Dependent Claim
25 words
An oil filter element in accordance with claim 9, wherein said oxygenated boron derivative is sandwiched between at least two layers of said permeable material.
Claim 18
Dependent Claim
24 words
An oil filter element in accordance with claim 9, wherein said oxygenated boron derivative is dispersed throughout the volume of said oil filter element.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |