US2874144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyperfluorochloroethylene and lead dioxide
Assignee: 3M Co
•
Filing: 1955-04-20
•
Granted: 1959-02-17
•
Expires: 1975-04-20
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A NOVEL PLASTIC COMPOSITION CONSISTING OF AN ADMIXTURE OF A HOMOPOLYMER OF TRIFLUOROCHLOROETHYLENE AND BETWEEN ABOUT 0.05 AND ABOUT 20 PARTS OF LEAD DIOXIDE PER 100 PARTS OF SAID HOMOPOLYMER, SAID HOMOPOLYMER BEING INERT TO CHEMICAL CROSS-LINKAGE IN THE PRESENCE OF LEAD DIOXIDE.
Claim 2
Dependent Claim
43 words
A NOVEL PLASTIC COMPOSITION CONSISTING OF AN ADMIXTURE OF A HOMOPOLYMER OF TRIFLUOROCHLOROETHYLENE AND BETWEEN ABOUT 0.05 AND ABOUT 20 PARTS OF LEAD DIOXIDE PER 100 PARTS OF SAID HOMOPOLYMER, SAID HOMOPOLYMER BEING INERT TO CHEMICAL CROSS-LINKAGE IN THE PRESENCE OF LEAD DIOXIDE.
References Cited (Backward Citations)
US2077429A
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US2141126A
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US2493390A
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US2507142A
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US2789959A
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |