Patent US2790785A successfully refreshed from Google Patents.
US2790785A
Expired / Lapsed
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Rubber stabilized with hydrocarbon tin mercapto alcohol esters
Assignee: Primerica Inc
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Filing: 1954-01-29
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Granted: 1957-04-30
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Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
- 👤 Elliott L Weinberg
- 👤 Louis A Tomka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A RUBBER COMPOSITION COMPRISING AS A BASIC INGREDIENT, A RUBBERY POLYMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, COPOLYMERS OF 1,3 BUTADIENE AND STYRENE AND COPOLYMERS OF 1,3 BUTADIENE AND ACRYLONITRILE AND CONTAINING A STABILIZING AMOUNT OF A HYDROCARBON TIN DERIVATIVE OF MERCAPTOALCOHOL ESTER HAVING THE FROMULA : RNSN(SR''OX)4-N, WHEREIN N IS AN INTEGER FROM 1 TO 3, R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL RADICALS, R'' IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYLENE AND ARYLENE RADICALS, X IS THE RESIDUE OF AN ACID AFTER REMOVAL OF ONE OH, SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF CARBOXY ACIDS, SULFURIC ACID, PHOSPHORIC ACID AND BORIC ACID AND WHEREIN TIN IS BONDED TO THE DIVALENT SULFUR OF THE (SR''OX) GROUP.
Claim 2
Dependent Claim
133 words
A RUBBER COMPOSITION COMPRISING AS A BASIC INGREDIENT, A RUBBERY POLYMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, COPOLYMERS OF 1,3 BUTADIENE AND STYRENE AND COPOLYMERS OF 1,3 BUTADIENE AND ACRYLONITRILE AND CONTAINING A STABILIZING AMOUNT OF A HYDROCARBON TIN DERIVATIVE OF MERCAPTOALCOHOL ESTER HAVING THE FROMULA : RNSN(SR''OX)4-N, WHEREIN N IS AN INTEGER FROM 1 TO 3, R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL RADICALS, R'' IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYLENE AND ARYLENE RADICALS, X IS THE RESIDUE OF AN ACID AFTER REMOVAL OF ONE OH, SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF CARBOXY ACIDS, SULFURIC ACID, PHOSPHORIC ACID AND BORIC ACID AND WHEREIN TIN IS BONDED TO THE DIVALENT SULFUR OF THE (SR''OX) GROUP.
References Cited (Backward Citations)
US2648650A
Cited
US2641596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |