Patent US1650010A successfully refreshed from Google Patents.
Patent US2849420A successfully refreshed from Google Patents.
US2849420A
Expired / Lapsed
US
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Rubber stabilized with metallic symmetrical disubstituted thiourea compound
Assignee: Bridgestone Firestone Inc
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Filing: 1953-07-24
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Granted: 1958-08-26
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Expires: 1973-07-24
Abstract
No abstract record available.
Inventors
- 👤 Henry P Stevens
- 👤 Lloyd O Bentz
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; C08K5/36; C08K5/39; C08K5/405; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A SULFUR VULCANIZED RUBBER COMPOSITION WHICH INCLUDES AS AN INHIBITOR OF DECOMPOSITION A SMALL AMOUNT OF A METALLIC COMPOUND OF A SYMMETRICAL DISUBSTITUTED THIOUREA OF THE CLASS CONSISTING OF SALTS AND OF ADDUCTS WITH A METAL SALT, EACH SUBSTITUENT BEING FROM THE CLASS CONSISTING OF ALKYL AND CYCLOALKYL GROUPS CONTAINING UP TO NINE CARBON ATOMS, AND THE METAL BEING BIVALENT AND FROM THE CLASS CONSISTING OF NICKEL, CADMIUM, LEAD, TIN AND ZINC.
Claim 2
Dependent Claim
72 words
A SULFUR VULCANIZED RUBBER COMPOSITION WHICH INCLUDES AS AN INHIBITOR OF DECOMPOSITION A SMALL AMOUNT OF A METALLIC COMPOUND OF A SYMMETRICAL DISUBSTITUTED THIOUREA OF THE CLASS CONSISTING OF SALTS AND OF ADDUCTS WITH A METAL SALT, EACH SUBSTITUENT BEING FROM THE CLASS CONSISTING OF ALKYL AND CYCLOALKYL GROUPS CONTAINING UP TO NINE CARBON ATOMS, AND THE METAL BEING BIVALENT AND FROM THE CLASS CONSISTING OF NICKEL, CADMIUM, LEAD, TIN AND ZINC.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |