US3929434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion reduction of tanker vessel cargo compartments
Assignee: Mobil Oil AS
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Filing: 1971-10-21
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Granted: 1975-12-30
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Expires: 1991-10-21
Abstract
Abstract Reducing the corrosion of tanker vessels cargo tanks which are inerted with gaseous products of combustion is described as being improved when the inerting gases are freed of oxygen and particularly carbon dioxide to each less than 2%.
Inventors
- 👤 Earnest E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:25
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/0009; A62C99/0018; B; B01; B01J; B01J19/00; B01J19/14; B63; B63J; B63J2/00; B65; B65D; B65D90/00; B65D90/22; B65D90/38; B65D90/44; Y; Y02; Y02T; Y02T70/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
IN A CARGO VESSEL RELYING UPON GASEOUS PRODUCTS OF COMBUSTION TO EFFECT INERTING OF VESSEL COMPARTMENTS AGAINST EXPLOSION HAZARDS, THE IMPROVEMENT FOR REDUCING THE CORROSION OF METAL EXPOSED TO SAID INERTING GAS WHICH COMPRISES, REDUCING THE CARBON DIOXIDE LEVEL OF THE INERTING GAS TO LESS THAN 2 VOL. PERCENT.
Claim 2
Dependent Claim
49 words
IN A CARGO VESSEL RELYING UPON GASEOUS PRODUCTS OF COMBUSTION TO EFFECT INERTING OF VESSEL COMPARTMENTS AGAINST EXPLOSION HAZARDS, THE IMPROVEMENT FOR REDUCING THE CORROSION OF METAL EXPOSED TO SAID INERTING GAS WHICH COMPRISES, REDUCING THE CARBON DIOXIDE LEVEL OF THE INERTING GAS TO LESS THAN 2 VOL. PERCENT.
Claim 3
Dependent Claim
21 words
The improvement of claim 1 wherein carbon dioxide is removed from the inerting gas before passage thereof to the vessel compartments.
Claim 4
Dependent Claim
47 words
The improvement of claim 1 wherein carbon dioxide is removed from the inerting gas after passage thereof to the vessel compartment by passing the inerting gas from the vessel compartment through a carbon dioxide removal step and returning carbon dioxide reduced inerting gas to the vessel compartment.
Claim 5
Dependent Claim
21 words
The improvement of claim 1 wherein carbon dioxide is removed by absorption in a liquid selective for that purpose under pressure.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |