Patent US2690435A successfully refreshed from Google Patents.
US2690435A
Expired / Lapsed
US
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Protection of rubber by stannous complex
Assignee: Bridgestone Firestone Inc
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Filing: 1952-04-25
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Granted: 1954-09-28
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF CURING RUBBER-LIKE COPOLYMER OF A CONJUGATED DIENE MONOMER AND A VINYL AROMATIC MONOMER WITHOUT SUBSTANTIAL DISCOLORATION WHICH COMPRISES HEATIANG THE SAME WITH VULCANIZING INGREDIENTS INCLUDING SULFUR AND AS STABILIZER A STANNOUS COMPLEX OF A PHENOLIC COMPOUND PRODUCED BY REACTION OF THE STANNOUSE SALT OF A STRONG ACID, AN ALKALI AND A PHENOLIC COMPOUND OF THE CLASS WHICH CONSISTS OF MONOHYDROXY AROMATIC COMPOUNDS AND POLYHYDROXY AROMATIC COMPOUNDS EXCEPT THOSE WHICH CONTAIN ORTHOHYDROXY GROUPS, WHICH COMPLEX CONTAINS MORE TIN THAN THE NORMAL STANNOUS SALT OF THE PHENOLIC COMPOUND.
Claim 2
Independent Claim
89 words
THE METHOD OF CURING RUBBER-LIKE COPOLYMER OF A CONJUGATED DIENE MONOMER AND A VINYL AROMATIC MONOMER WITHOUT SUBSTANTIAL DISCOLORATION WHICH COMPRISES HEATIANG THE SAME WITH VULCANIZING INGREDIENTS INCLUDING SULFUR AND AS STABILIZER A STANNOUS COMPLEX OF A PHENOLIC COMPOUND PRODUCED BY REACTION OF THE STANNOUSE SALT OF A STRONG ACID, AN ALKALI AND A PHENOLIC COMPOUND OF THE CLASS WHICH CONSISTS OF MONOHYDROXY AROMATIC COMPOUNDS AND POLYHYDROXY AROMATIC COMPOUNDS EXCEPT THOSE WHICH CONTAIN ORTHOHYDROXY GROUPS, WHICH COMPLEX CONTAINS MORE TIN THAN THE NORMAL STANNOUS SALT OF THE PHENOLIC COMPOUND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |