US2820776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking of fluorine-containing elastomers
Assignee: 3M Co
•
Filing: 1955-03-21
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Granted: 1958-01-21
•
Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Lester E Robb
- 👤 Martin E Conroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF CROSS-LINKING A CHAIN SATURATED ALIPHATIC POLYMER COMPOSED SUBSTANTIALLY EXCLUSIVELY OF CARBON, HYDROGEN AND HALOGEN ATOMS, CONTAINING FLUORINE SUBSTITUENTS AT AT LEAST HALF OF THE POSSIBLE POSITONS FOR SUCH SUBSTITUENTS, AND HAVING AT LEAST 10% OF THE CARBON ATOMS IN THE CHAIN BONDED SOLELY TO HYDROGEN ATOMS AND OTHER CARBON CHAINS, WHICH COMPRISES HEATING SAID POLYMER TO A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 200*C. IN THE PRESENCE OF AN ORGANIC PEROXY COMPOUND WHICH IS STABLE AT TEMPERATURE BELOW ABOUT 50*C. IN THE PRESENCE OF A BASIC METAL COMPOUND AND IN THE PRESENCE OF A COMPOUND CONTAINING IONIC LEAD OTHER THAN SAID BASIC METAL COMPOUND.
Claim 2
Independent Claim
107 words
A METHOD OF CROSS-LINKING A CHAIN SATURATED ALIPHATIC POLYMER COMPOSED SUBSTANTIALLY EXCLUSIVELY OF CARBON, HYDROGEN AND HALOGEN ATOMS, CONTAINING FLUORINE SUBSTITUENTS AT AT LEAST HALF OF THE POSSIBLE POSITONS FOR SUCH SUBSTITUENTS, AND HAVING AT LEAST 10% OF THE CARBON ATOMS IN THE CHAIN BONDED SOLELY TO HYDROGEN ATOMS AND OTHER CARBON CHAINS, WHICH COMPRISES HEATING SAID POLYMER TO A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 200*C. IN THE PRESENCE OF AN ORGANIC PEROXY COMPOUND WHICH IS STABLE AT TEMPERATURE BELOW ABOUT 50*C. IN THE PRESENCE OF A BASIC METAL COMPOUND AND IN THE PRESENCE OF A COMPOUND CONTAINING IONIC LEAD OTHER THAN SAID BASIC METAL COMPOUND.
References Cited (Backward Citations)
US2628214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |