Patent US3634313A successfully refreshed from Google Patents.
US3634313A
Expired / Lapsed
US
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Antiozonants for rubber
Assignee: Wyeth Holdings LLC
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Filing: 1969-08-20
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Granted: 1972-01-11
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Expires: 1989-08-20
Abstract
Abstract A COMPOUND OF THE FORMULA: 1-(R-NH-),4-(R''-NH-)BENZENE WHEREIN R IS EITHER FURFURYL OR TETAHYDROFURFURYL AND R'' IS PHENYL OR NAPHTHYL, OR LOWER-ALKYL OR LOWER-ALKOXY SUBSITUTED PHENYL OR NAPHTHYL, OR THE SAME AS R'' AND THE USE OF SUCH COMPOUND AS AN ANTIOZONANT IN RUBBER COMPOSITIONS.
Inventors
- 👤 Frank Aloysius Vincen Sullivan
- 👤 Tamara Dejneka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:08
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52; C07D307/04; C07D307/10; C07D307/14; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 0
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |