US3268494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Shell USA Inc
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Filing: 1962-12-28
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Granted: 1966-08-23
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Stephen A Herbert
- 👤 Harry F Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C08F220/1818; C08F28/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/02; C10N2040/12; C10N2040/13; C10N2040/20; C10N2040/25; C10N2040/255; C10N2040/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN OIL-SOLUBLE COPOLYMER OF (1) AN ESTER OF AN ACRYLIC ACID AND A C8-18 ALKANOL, AND (2) AN STER OF AN ACRYLIC ACID AND A SULFUR-CONTAINING ALCOHOL OF THE FORMULA RXR''OH WHEREIN X IS A SULFUR ATOM R IS AN ALKYL RADICAL AND R'' AND ALKYLENE RADICAL, SAID COPOLYMER HAVING A MOLECULAR WEIGHT BETWEEN 5000 AND 1,000,000 AS DETERMINED BY THE LIGHT SCATTERING TECHNIQUE, AND SAID COPOLYMER BEING PREPARED BY POLYMERIZING MONOMER DEFINED IN (1) ABOVE AND MONOMER DEFINED IN (2) ABOVE IN A MOL RATIO BETWEEN 1:3 AND 5:1.
Claim 2
Dependent Claim
90 words
AN OIL-SOLUBLE COPOLYMER OF (1) AN ESTER OF AN ACRYLIC ACID AND A C8-18 ALKANOL, AND (2) AN STER OF AN ACRYLIC ACID AND A SULFUR-CONTAINING ALCOHOL OF THE FORMULA RXR''OH WHEREIN X IS A SULFUR ATOM R IS AN ALKYL RADICAL AND R'' AND ALKYLENE RADICAL, SAID COPOLYMER HAVING A MOLECULAR WEIGHT BETWEEN 5000 AND 1,000,000 AS DETERMINED BY THE LIGHT SCATTERING TECHNIQUE, AND SAID COPOLYMER BEING PREPARED BY POLYMERIZING MONOMER DEFINED IN (1) ABOVE AND MONOMER DEFINED IN (2) ABOVE IN A MOL RATIO BETWEEN 1:3 AND 5:1.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |