US3364729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak detection system and method for cold liquid storage tanks
Assignee: Individual
•
Filing: 1966-10-27
•
Granted: 1968-01-23
•
Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Donald R Yearwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/22; G01M3/226; F; F17; F17C; F17C13/00; F17C13/12; F17C13/126; F16; F16L; F16L2101/00; F16L2101/30; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0631; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2203/0646; F17C2203/0648; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/03; F17C2250/036; F17C2250/04; F17C2250/0404; F17C2250/0447; F17C2260/00; F17C2260/03; F17C2260/035; F17C2260/038; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A SYSTEM FOR DETECTING LEAKS IN THE PRIMARY BARRIER OF A DOUBLE WALL LIQUEFIED GAS STORAGE TANK WHEREIN THE INNER AND OUTER WALLS DEFINE A CLOSED SPACE AND THE LIQUEFIED GAS IS HOUSED IN THE INNER BARRIER AT ABOUT AMBIENT PRESSURE, THE SYSTEM COMPRISING A SUPPLY OF COLD GAS WHICH INCLUDES AT LEAST IN PART A GAS OF THE SAME TYPE AS THE LIQUID TO BE STORED, FIRST MEANS TO DELIVER THE COLD GAS TO SAID CLOSED SPACE, A SUPPLY OF ADDITIVE GAS HAVING CONDENSATION AND SUBLIMATION TEMPERATURES BELOW THE TEMPERATURE OF THE LIQUEFIELD GAS IN THE INNER TANK, SECOND MEANS TO DELIVER A FIXED AMOUNT OF ADDITIVE GAS TO SAID CLOSED SPACE, BLOWER MEANS TO CIRCULATE THE GAS MIXTURE IN SAID CLOSED SPACE SO AS TO MAKE THE MIXTURE UNIFORM THROUGHOUT, AND GAS ANALYZER MEANS TO SAMPLE A PART OF THE MIXTURE IN SAID SPACE AND DETECT THE ADDITIVE PARTSPER-MILLION AND TO ACTUATE AN INDICATING MEANS IN RESPONSE TO SENSING AN ADDITIVE PARTS-PER-MILLION DECREASE.
Claim 2
Independent Claim
165 words
A SYSTEM FOR DETECTING LEAKS IN THE PRIMARY BARRIER OF A DOUBLE WALL LIQUEFIED GAS STORAGE TANK WHEREIN THE INNER AND OUTER WALLS DEFINE A CLOSED SPACE AND THE LIQUEFIED GAS IS HOUSED IN THE INNER BARRIER AT ABOUT AMBIENT PRESSURE, THE SYSTEM COMPRISING A SUPPLY OF COLD GAS WHICH INCLUDES AT LEAST IN PART A GAS OF THE SAME TYPE AS THE LIQUID TO BE STORED, FIRST MEANS TO DELIVER THE COLD GAS TO SAID CLOSED SPACE, A SUPPLY OF ADDITIVE GAS HAVING CONDENSATION AND SUBLIMATION TEMPERATURES BELOW THE TEMPERATURE OF THE LIQUEFIELD GAS IN THE INNER TANK, SECOND MEANS TO DELIVER A FIXED AMOUNT OF ADDITIVE GAS TO SAID CLOSED SPACE, BLOWER MEANS TO CIRCULATE THE GAS MIXTURE IN SAID CLOSED SPACE SO AS TO MAKE THE MIXTURE UNIFORM THROUGHOUT, AND GAS ANALYZER MEANS TO SAMPLE A PART OF THE MIXTURE IN SAID SPACE AND DETECT THE ADDITIVE PARTSPER-MILLION AND TO ACTUATE AN INDICATING MEANS IN RESPONSE TO SENSING AN ADDITIVE PARTS-PER-MILLION DECREASE.
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |