Patent US3172872A successfully refreshed from Google Patents.
US3172872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diolefin rubbers stabilized with mercaptans and quinones
Assignee: —
•
Filing: —
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Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/08; C08K5/36; C08K5/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AS A COMPOSITION OF MATTER, A POLYMER OF INCREASED STABILITY AGAINST OXIDATIVE DEGRADATION COMPRISING A RUBBERY POLYMER OF A CONJUGATED DIENE HAVING FROM 4 TO 12 CARBON ATOMS HAVING INCORPORATED THEREIN (A) A QUINONE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF 1,4-NAPHTHOQUINONE AND P-QUINONE AND (B) A MERCAPTAN COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIO-2-NAPHTHOL, NHEXADECYL MERCAPTAN AND ETHYLENE GLYCOL DIMERCAPTO ACETATE, THE TOTAL AMOUNT OF (A) AND (B) RANGING FROM 0.1 TO 3.0 WEIGHT PARTS PER ONE HUNDRED (100) PARTS RUBBER AND THE MOL RATIO OF (A) TO (B) RANGING FROM 0.5:1 TO 2.0:1.
Claim 2
Dependent Claim
96 words
AS A COMPOSITION OF MATTER, A POLYMER OF INCREASED STABILITY AGAINST OXIDATIVE DEGRADATION COMPRISING A RUBBERY POLYMER OF A CONJUGATED DIENE HAVING FROM 4 TO 12 CARBON ATOMS HAVING INCORPORATED THEREIN (A) A QUINONE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF 1,4-NAPHTHOQUINONE AND P-QUINONE AND (B) A MERCAPTAN COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIO-2-NAPHTHOL, NHEXADECYL MERCAPTAN AND ETHYLENE GLYCOL DIMERCAPTO ACETATE, THE TOTAL AMOUNT OF (A) AND (B) RANGING FROM 0.1 TO 3.0 WEIGHT PARTS PER ONE HUNDRED (100) PARTS RUBBER AND THE MOL RATIO OF (A) TO (B) RANGING FROM 0.5:1 TO 2.0:1.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |