Patent US2817635A successfully refreshed from Google Patents.
US2817635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of paraffin deposition and plugging
Assignee: Texaco Inc
•
Filing: 1954-07-27
•
Granted: 1957-12-24
•
Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Marcene S Goldman
- 👤 Charles C Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C09; C09K; C09K8/00; C09K8/52; C09K8/524; C10L1/106; C10L1/12; C10L1/1291; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10L1/1985; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE TRANSPORTATION OF A FLUID THROUGH A CONDUIT, WHEREIN SAID FLUID CONTAINS WAXY MATERIALS WHICH TEND TO DEPOSIT AND BUILD UP OBECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE SURFACE OF SAID CONDUIT IN CONTACT WITH SAID FLUID, THE IMPROVEMENT WHICH COMPRISES INJECTING INTO SAID FLUID BEING TRANSPORTED THROUGH SAID CONDUIT SUBSTANTIALLY EQUAL AMOUNTS OF AN ALKALI METAL SILICATE AND A NON-IONIC, SURFACE-ACTIVE POLYOXYALKYLENE DERIVATION OF A HEXITOL ANHYDRIDE PARTIAL LONG CHAIN FATTY ACID ESTER, SAID AMOUNTS BEING SUFFICIENT TO PREVENT A BUILD-UP OF OBJECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE SURFACE OF SAID CONDUIT.
Claim 2
Dependent Claim
97 words
IN THE TRANSPORTATION OF A FLUID THROUGH A CONDUIT, WHEREIN SAID FLUID CONTAINS WAXY MATERIALS WHICH TEND TO DEPOSIT AND BUILD UP OBECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE SURFACE OF SAID CONDUIT IN CONTACT WITH SAID FLUID, THE IMPROVEMENT WHICH COMPRISES INJECTING INTO SAID FLUID BEING TRANSPORTED THROUGH SAID CONDUIT SUBSTANTIALLY EQUAL AMOUNTS OF AN ALKALI METAL SILICATE AND A NON-IONIC, SURFACE-ACTIVE POLYOXYALKYLENE DERIVATION OF A HEXITOL ANHYDRIDE PARTIAL LONG CHAIN FATTY ACID ESTER, SAID AMOUNTS BEING SUFFICIENT TO PREVENT A BUILD-UP OF OBJECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE SURFACE OF SAID CONDUIT.
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |