US2855330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying filter coatings
Assignee: Texaco Inc
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Filing: 1956-08-21
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Granted: 1958-10-07
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Expires: 1976-08-21
Abstract
No abstract record available.
Inventors
- 👤 Richard H Griswold
- 👤 Newton P Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
B; B01; B01D; B01D46/00; B01D37/00; B01D37/02; Y; Y10; Y10S; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE FORMATION OF A GAS FILTER, A PROCESS FOR SPRAYING A MINERAL LUBRICATING OIL CONTAINING 2-5 WEIGHT PERCENT POLYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 10,000 AND 30,000 ONTO A GAS FILTER WHICH COMPRISES HEATING A GAS SELECTED FROM THE GROUP CONSISTING OF AIR, NITROGEN, CARBON DIOXIDE, HELIUM AND FLUE GAS TO A TEMPERATURE BETWEEN 225 AND 325*F., CONTACTING SAID HEATED GAS WITH SAID POLYETHYLENE-CONTAINING LUBRICATING OIL, SAID LUBRICATING OIL PRIOR TO CONTACT WITH SAID GAS BEING AT A TEMPERATURE BELOW 140*F., SUSPENDING SAID POLYETHYLENE-CONTAINING LUBRICATING OIL IN SAID GAS AND CONTACTING SAID GAS WITH SAID GAS FILTER WHEREBY SAID POLYETHYLENE-CONTAINING LUBRICATING OIL PENETRATES INTO THE PORES OF SAID GAS FILTER AND IS EVENLY DISTRIBUTED OVER THE SURFACE THEREOF.
Claim 2
Dependent Claim
120 words
IN THE FORMATION OF A GAS FILTER, A PROCESS FOR SPRAYING A MINERAL LUBRICATING OIL CONTAINING 2-5 WEIGHT PERCENT POLYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 10,000 AND 30,000 ONTO A GAS FILTER WHICH COMPRISES HEATING A GAS SELECTED FROM THE GROUP CONSISTING OF AIR, NITROGEN, CARBON DIOXIDE, HELIUM AND FLUE GAS TO A TEMPERATURE BETWEEN 225 AND 325*F., CONTACTING SAID HEATED GAS WITH SAID POLYETHYLENE-CONTAINING LUBRICATING OIL, SAID LUBRICATING OIL PRIOR TO CONTACT WITH SAID GAS BEING AT A TEMPERATURE BELOW 140*F., SUSPENDING SAID POLYETHYLENE-CONTAINING LUBRICATING OIL IN SAID GAS AND CONTACTING SAID GAS WITH SAID GAS FILTER WHEREBY SAID POLYETHYLENE-CONTAINING LUBRICATING OIL PENETRATES INTO THE PORES OF SAID GAS FILTER AND IS EVENLY DISTRIBUTED OVER THE SURFACE THEREOF.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |