Patent US5692907A successfully refreshed from Google Patents.
US2833752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking of fluorinated elastomers
Assignee: 3M Co
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Filing: 1954-06-14
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Granted: 1958-05-06
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Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Francis J Honn
- 👤 Willard M Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF CROSS-LINKING A CHAIN SATURATED POLYMER, CONTAINING FLUORINE SUBSTITUTION AT AT LEAST HALF THE POSITIONS AVAILABLE FOR SUCH SUBSTITUTION AND COMPOSED SUBSTANTIALLY EXCLUSIVELY OF CARBON, HYDROGEN AND HALOGEN ATOMS WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF AN ORGANIC PEROXY COMPOUND WHICH IS RELATIVELY STABLE AT TEMPERATURES BELOW ABOUT 50*C. AND IN THE PRESENCE OF A BASIC METAL COMPOUND.
Claim 2
Independent Claim
62 words
A METHOD OF CROSS-LINKING A CHAIN SATURATED POLYMER, CONTAINING FLUORINE SUBSTITUTION AT AT LEAST HALF THE POSITIONS AVAILABLE FOR SUCH SUBSTITUTION AND COMPOSED SUBSTANTIALLY EXCLUSIVELY OF CARBON, HYDROGEN AND HALOGEN ATOMS WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF AN ORGANIC PEROXY COMPOUND WHICH IS RELATIVELY STABLE AT TEMPERATURES BELOW ABOUT 50*C. AND IN THE PRESENCE OF A BASIC METAL COMPOUND.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |