Patent US2603604A successfully refreshed from Google Patents.
US2603604A
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Lubricating composition
Assignee: Shell Development Co
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Filing: 1948-11-01
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Granted: 1952-07-15
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Expires: 1968-11-01
Abstract
No abstract record available.
Inventors
- 👤 Ballard Seaver Ames
- 👤 Morris Rupert Clarke
- 👤 John L Van Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:09
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/02; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A STABLE LIQUID LUBRICATING COMPOSITION COMPRISING 90-99% BY WEIGHT OF A LIQUID ALIPHATIC ESTER OF A BIS(HYDROXYALKYL) SULFIDE, THE HYDROCARBON UNITS OF SAID ESTER BEING ALIPHATIC HYDROCARBON RADICALS HAVING FROM 2 TO 20 CARBON ATOMS EACH, AND 1-10% BY WEIGHT OFF A POLYMERIZED METHACRYLIC ACID ESTER HAVING A MOLECULAR WEIGHT BETWEEN 10,000 AND 25,000.
Claim 2
Dependent Claim
54 words
A STABLE LIQUID LUBRICATING COMPOSITION COMPRISING 90-99% BY WEIGHT OF A LIQUID ALIPHATIC ESTER OF A BIS(HYDROXYALKYL) SULFIDE, THE HYDROCARBON UNITS OF SAID ESTER BEING ALIPHATIC HYDROCARBON RADICALS HAVING FROM 2 TO 20 CARBON ATOMS EACH, AND 1-10% BY WEIGHT OFF A POLYMERIZED METHACRYLIC ACID ESTER HAVING A MOLECULAR WEIGHT BETWEEN 10,000 AND 25,000.
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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |