US2581907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubbery diolefinic polymers containing as antioxidant a mixture of antimony oxide and a 2, 4, 6 trihydrocarbon substituted phenol
Assignee: Bridgestone Firestone Inc
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Filing: 1946-03-09
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Granted: 1952-01-08
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Expires: 1966-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A RUBBER-LIKE COPOLYMER OF A CONJUGATED DIENE AND A VINYL AROMATIC MONOMER WHICH CONTAINS AS ANTIOXIDANT A MIXTURE OF ANTIMONY OXIDE AND A 2,4,6-TRISUBSTITUTED PHENOL IN WHICH THE SUBSTITUENTS ARE NONARYL HYDROCARBON SUBSTITUENTS, THE SUBSTITUENT IN THE PARA POSITION CONTAINS 1 TO 10 CARBON ATOMS, AND THE SUM OF THE CARBON ATOMS IN THE ORTHO POSITIONS IS 2 TO 20.
Claim 2
Dependent Claim
60 words
A RUBBER-LIKE COPOLYMER OF A CONJUGATED DIENE AND A VINYL AROMATIC MONOMER WHICH CONTAINS AS ANTIOXIDANT A MIXTURE OF ANTIMONY OXIDE AND A 2,4,6-TRISUBSTITUTED PHENOL IN WHICH THE SUBSTITUENTS ARE NONARYL HYDROCARBON SUBSTITUENTS, THE SUBSTITUENT IN THE PARA POSITION CONTAINS 1 TO 10 CARBON ATOMS, AND THE SUM OF THE CARBON ATOMS IN THE ORTHO POSITIONS IS 2 TO 20.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |