US3177704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak testing method
Assignee: Individual
•
Filing: 1962-08-28
•
Granted: 1965-04-13
•
Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Robert H Stange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
G; G01; G01L; G01L21/00; G01L21/02; G01L21/04; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/32; G01M3/3281; G01M3/329
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD FOR DETERMINING THE QUANTITATIVE LEAK RATE OF PRESSURE VESSELS CHARGED WITH A DRY PERMANENT GAS COMPRISING THE STEPS OF ENCLOSING SAID PRESSURE VESSEL IN A SEALED CHAMBER, EVACUATING SAID CHAMBER, DETERMINING THE PRESSURE RISE OVER A PREDETERMINED PERIOD OF TIME DUE ONLY TO LEAKAGE OF SAID DRY GAS FROM SAID VESSEL WITH A VACUUM GUAGE WHOSE READINGS ARE SUBSTANTIALLY UNAFFECTED BY THE PRESENECE OF A CONDENSABLE VAPOR WITHIN SAID CHAMBER, INTRODUCING A PREDETERMINED QUANTITY OF SAID DRY GAS INTO SAID CHAMBER PRIOR TO THE DETERMINATION OF THE PRESSURE RISE DUE TO LEAKAGE, AND CALIBRATING SAID GUAGE ACCORDING TO INITIAL AND FINAL READINGS TAKEN BEFORE AND AFTER INTRODUCTION OF SAID DRY GAS.
Claim 2
Independent Claim
113 words
A METHOD FOR DETERMINING THE QUANTITATIVE LEAK RATE OF PRESSURE VESSELS CHARGED WITH A DRY PERMANENT GAS COMPRISING THE STEPS OF ENCLOSING SAID PRESSURE VESSEL IN A SEALED CHAMBER, EVACUATING SAID CHAMBER, DETERMINING THE PRESSURE RISE OVER A PREDETERMINED PERIOD OF TIME DUE ONLY TO LEAKAGE OF SAID DRY GAS FROM SAID VESSEL WITH A VACUUM GUAGE WHOSE READINGS ARE SUBSTANTIALLY UNAFFECTED BY THE PRESENECE OF A CONDENSABLE VAPOR WITHIN SAID CHAMBER, INTRODUCING A PREDETERMINED QUANTITY OF SAID DRY GAS INTO SAID CHAMBER PRIOR TO THE DETERMINATION OF THE PRESSURE RISE DUE TO LEAKAGE, AND CALIBRATING SAID GUAGE ACCORDING TO INITIAL AND FINAL READINGS TAKEN BEFORE AND AFTER INTRODUCTION OF SAID DRY GAS.
References Cited (Backward Citations)
US2507321A
Cited
US2784373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |