US2661340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cyclized rubber
Assignee: Rubber Stichting
•
Filing: 1950-09-08
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Granted: 1953-12-01
•
Expires: 1970-09-08
Abstract
No abstract record available.
Inventors
- 👤 Gerardus Johannes Van Veersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:36
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE MANUFACTURE OF CYCLIZED RUBBER, THE PROCESS WHICH COMPRISES ADDING TO AN AQUEOUS LATEX OF AN UNSATURATED RUBBER CAPABLE OF BEING CYCLIZED AND SELECTED FROM THE CLASS CONSISTING OF NATURAL RUBBER AND THE SYNTHETIC RUBBERY HOMOPOLYMERS AND COPOLYMERS OF CONJUGATED DIOLEFIN HYDROCARBONS, A SMALL AMOUNT OF A CATIONIC SURFACE-ACTIVE AGENT CAPABLE OF STABILIZING THE LATEX IN THE PRESENCE OF CONCENTRATED SULFURIC ACID AND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
73 words
IN THE MANUFACTURE OF CYCLIZED RUBBER, THE PROCESS WHICH COMPRISES ADDING TO AN AQUEOUS LATEX OF AN UNSATURATED RUBBER CAPABLE OF BEING CYCLIZED AND SELECTED FROM THE CLASS CONSISTING OF NATURAL RUBBER AND THE SYNTHETIC RUBBERY HOMOPOLYMERS AND COPOLYMERS OF CONJUGATED DIOLEFIN HYDROCARBONS, A SMALL AMOUNT OF A CATIONIC SURFACE-ACTIVE AGENT CAPABLE OF STABILIZING THE LATEX IN THE PRESENCE OF CONCENTRATED SULFURIC ACID AND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF
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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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |