Patent US2989462A successfully refreshed from Google Patents.
US2989462A
Expired / Lapsed
US
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Method for safety-sealing valves
Assignee: Standard Oil Co
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Filing: 1958-10-31
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Granted: 1961-06-20
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Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 Manford R Haxton
- 👤 Lyle M Lovell
- 👤 Jr Jesse L Kitchens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:39
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; F16K41/00; F16K41/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A REGENERATIVE PLATINUM CATALYST HYDROCARBON CONVERSION SYSTEM COMPRISING A REACTION ZONE, A REGENERATION-GAS-SUPPLY ZONE, AND A CONDUIT CONNECTING SAID REACTION ZONE AND SAID REGENERATION-GAS-SUPPLY ZONE, SAID CONDUIT HAVING TWO VALVES IN SERIES INTERMEDIATE THE EXTREMITIES THEREOF, SAID VALVES WHEN CLOSED BEING SAFETYSEALED WITH FLUE GAS IN THE BONNETS OF THE VALVES, SUCH FLUE GAS BEING CAPABLE OF CAUSING CATALYST DEACTIVATION AND/OR LOWER PRODUCT YIELDS, THE IMPROVED METHOD OF SAFETY-SEALING SAID VALVES WHICH COMPRISES MAINTAINING PRESSURE OF FLUE GAS IN THE BONNET OF THE VALVE ADJACENT SAID REGENERATION ZONE SUBSTANTIALLY IN EXCESS OF THE PRESSURE BOTH IN SAID REACTION ZONE AND IN SAID REGENERATION ZONE, AND MAINTAINING THE PRESSURE OF THE FLUE GAS IN THE BONNET OF THE VALVE ADJACENT SAID REACTION ZONE SUBSTANTIALLY EQUAL TO THE PRESSURE IN SAID REACTION ZONE, WHEREBY EXPLOSIVE INTERMIXING OF OXYGEN-CONTAINING REGENERATION GASES AND HYDROCARBONS IS PREVENTED AND LEAKAGE OF FLUE GAS INTO SAID REACTION ZONE IS MINIMIZED.
Claim 2
Dependent Claim
154 words
IN A REGENERATIVE PLATINUM CATALYST HYDROCARBON CONVERSION SYSTEM COMPRISING A REACTION ZONE, A REGENERATION-GAS-SUPPLY ZONE, AND A CONDUIT CONNECTING SAID REACTION ZONE AND SAID REGENERATION-GAS-SUPPLY ZONE, SAID CONDUIT HAVING TWO VALVES IN SERIES INTERMEDIATE THE EXTREMITIES THEREOF, SAID VALVES WHEN CLOSED BEING SAFETYSEALED WITH FLUE GAS IN THE BONNETS OF THE VALVES, SUCH FLUE GAS BEING CAPABLE OF CAUSING CATALYST DEACTIVATION AND/OR LOWER PRODUCT YIELDS, THE IMPROVED METHOD OF SAFETY-SEALING SAID VALVES WHICH COMPRISES MAINTAINING PRESSURE OF FLUE GAS IN THE BONNET OF THE VALVE ADJACENT SAID REGENERATION ZONE SUBSTANTIALLY IN EXCESS OF THE PRESSURE BOTH IN SAID REACTION ZONE AND IN SAID REGENERATION ZONE, AND MAINTAINING THE PRESSURE OF THE FLUE GAS IN THE BONNET OF THE VALVE ADJACENT SAID REACTION ZONE SUBSTANTIALLY EQUAL TO THE PRESSURE IN SAID REACTION ZONE, WHEREBY EXPLOSIVE INTERMIXING OF OXYGEN-CONTAINING REGENERATION GASES AND HYDROCARBONS IS PREVENTED AND LEAKAGE OF FLUE GAS INTO SAID REACTION ZONE IS MINIMIZED.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |