Patent US3891608A successfully refreshed from Google Patents.
US3891608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber mixtures showing improved surface tack
Assignee: BASF SE
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Filing: 1974-07-05
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Granted: 1975-06-24
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Expires: 1994-07-05
Abstract
Abstract Rubber mixtures containing a 2-oxohexahydropyrimidine of the general formula: WHEREIN THE RADICALS R1 to R6 are the same or different and each individually denotes hydrogen or alkyl of from 1 to 20 carbon atoms. Such rubber mixtures possess excellent and persistent surface tack.
Inventors
- 👤 Harro Petersen
- 👤 Paulus Erhard
- 👤 Hubertus Queins
- 👤 Hubert Schoeppl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
RUBBER MIXTURES CONTAINING FROM 1 TO 20 PARTS, BASED ON 100 PARTS OF RUBBER, OF A 2-OXOHEXAHYDROPYRIMIDINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
21 words
RUBBER MIXTURES CONTAINING FROM 1 TO 20 PARTS, BASED ON 100 PARTS OF RUBBER, OF A 2-OXOHEXAHYDROPYRIMIDINE OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2804448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |