US3859805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat bottom ship tank for transport of liquefied gas
Assignee: Chicago Bridge and Iron Co
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Filing: 1974-02-08
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Granted: 1975-01-14
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Expires: 1994-02-08
Abstract
Abstract A combination of a ship having a hold with a bottom and walls, and a tank, which is circular in horizontal section, for transporting a liquefied gas; said tank having a metal shell having (1) a substantially flat metal bottom (2) a spheroidal section constituting most of the upper part of the tank and (3) a toroidal knuckle portion tangentially joined to the periphery of the metal bottom and tangentially joined to the spheroidal section; load bearing insulation between the ship hold bottom and the tank metal bottom; and a skirt, circular in horizontal section, extending from the tank above the toroidal knuckle portion downwardly to a supporting base in the ship hold.
Inventors
- 👤 Paul Richard Johnson
- 👤 Jamshid Teymourian
- 👤 Elmer Weyman Rothrock
- 👤 Willis James Kircik
- 👤 Kenneth Wilson Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:25
CPC Classifications
B; B63; B63B; B63B25/00; B63B25/02; B63B25/08; B63B25/12; B63B25/16; F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2201/0142; F17C2201/0147; F17C2201/0166; F17C2201/03; F17C2201/035; F17C2201/05; F17C2201/052; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/013; F17C2203/03; F17C2203/0304; F17C2203/0354; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0631; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2221/00; F17C2221/01; F17C2221/012; F17C2221/016; F17C2221/017; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S220/00; Y10S220/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
In combination: a ship having a hold with a bottom and walls; a tank, which is circular in horizontal section, for transporting a liquefied gas; said tank comprising a metal shell having (1l ) a substantially flat metal bottom (2) a spheroidal section constituting most of the upper part of the tank and (3) a toroidal knuckle portion tangentially joined to the periphry of the metal button and tangentially joined to the spheroidal section; load bearing insulation between the ship hold bottom and the tank metal bottom; and a skirt, circular in hoirzontal section, extending from the tank downwardly to a supporting base in the ship hold.
Claim 2
Dependent Claim
107 words
In combination: a ship having a hold with a bottom and walls; a tank, which is circular in horizontal section, for transporting a liquefied gas; said tank comprising a metal shell having (1l ) a substantially flat metal bottom (2) a spheroidal section constituting most of the upper part of the tank and (3) a toroidal knuckle portion tangentially joined to the periphry of the metal button and tangentially joined to the spheroidal section; load bearing insulation between the ship hold bottom and the tank metal bottom; and a skirt, circular in hoirzontal section, extending from the tank downwardly to a supporting base in the ship hold.
Claim 3
Dependent Claim
12 words
A combination according to claim 1 in which the skirt is conical.
Claim 4
Dependent Claim
12 words
A combination according to claim 1 in which the skirt is cylindrical.
Claim 5
Dependent Claim
38 words
A combination according to claim 1 in which the tank shell above the skirt is externally insulated, the skirt is insulated externally for its full height and the skirt is insulated internally over at least its lower portion.
Claim 6
Dependent Claim
30 words
A combination according to claim 1 in which the toroidal knuckle, in vertical radial section, is tapered and has its thinnest edge joined to the periphery of the tank bottom.
Claim 7
Dependent Claim
20 words
A combination according to claim 1 in which a membrane is between he ship hold bottom and the tank bottom.
Claim 8
Dependent Claim
21 words
A combination according to claim 1 in which a drip sheet is between the ship hold bottom and the tank bottom.
Claim 9
Dependent Claim
21 words
A combination according to claim 7 in which the drip sheet extends upwardly against insulation on the inside of the skirt.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |