US4086066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing microorganism induced corrosion of hydrocarbon liquid storage tanks
Assignee: ChampionX LLC
•
Filing: 1977-02-22
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Granted: 1978-04-25
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Expires: 1997-02-22
Abstract
Abstract Microorganism induced corrosion of storage vessels which contain a heel of water and an upper layer of hydrocarbon liquid may be prevented by adding to the hydrocarbon liquid contained in such storage vessels a water-dispersible polyvinyl alcohol package which contains a microbiocide.
Inventors
- 👤 Arthur R. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; A; A01; A01N; A01N55/00; A01N55/02; A01N55/04; C10L1/12; C10L1/14; C10L1/20; C10L1/204; C10L1/24; C10L1/2425; C10L1/30; C10L1/301; C10L1/305; C10L1/308
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A method for preventing microorganism induced corrosion of a storage vessel which contains a small lower layer of water and a large upper layer of a hydrocarbon liquid by introducing a microorganism control chemical into the small lower layer of water which comprises: (A) placing the microorganism control chemical inside a polyvinyl alcohol package; (B) sealing the polyvinyl alcohol package; (C) dropping the polyvinyl alcohol package into the storage vessel so that it can penetrate the large upper layer of hydrocarbon liquid and pass into the small lower layer of water; and, (D) permitting the polyvinyl alcohol package to dissolve in the water thereby releasing the microorganism control chemical.
Claim 2
Independent Claim
109 words
A method for preventing microorganism induced corrosion of a storage vessel which contains a small lower layer of water and a large upper layer of a hydrocarbon liquid by introducing a microorganism control chemical into the small lower layer of water which comprises: (A) placing the microorganism control chemical inside a polyvinyl alcohol package; (B) sealing the polyvinyl alcohol package; (C) dropping the polyvinyl alcohol package into the storage vessel so that it can penetrate the large upper layer of hydrocarbon liquid and pass into the small lower layer of water; and, (D) permitting the polyvinyl alcohol package to dissolve in the water thereby releasing the microorganism control chemical.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein a weighting agent is placed in the polyvinyl alcohol package along with the microorganism control chemical in order to make the package sink through the large upper layer of hydrocarbon liquid to the small lower layer of water.
Claim 4
Dependent Claim
12 words
The method of claim 1 where the microbiocide is methylene bis thiocyanate.
Claim 5
Dependent Claim
19 words
The method of claim 1 where the microbiocide is a mixture of tributyl tin oxide and methylene bis thiocyanate.
Claim 6
Dependent Claim
12 words
The method of claim 1 where the microbiocide is a nickel compound.
Claim 7
Dependent Claim
12 words
The method of claim 1 where the microbiocide is tributyl tin oxide.
References Cited (Backward Citations)
US3393058A
Cited
US3892905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |