US3761454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable fluorinated polymer compositions process for vulcanization and vulcanized elastomers obtained therefrom
Assignee: Montedison SpA
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Filing: 1971-07-06
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Granted: 1973-09-25
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Expires: 1991-07-06
Abstract
Abstract VULCANIZABLE COMPOSITION COMPRISING (A) A FLUORINATED INTERPOLYMER AND (B) A VULCANIZING SYSTEM WHICH COMPRISES (1) A CARBAMATE, OXALATE, FORMATE OR ACETATE OF EITHER PIPERAZINE OR OF AN ALKYLENEDIPIPERIDINE OF THE FORMULA (2-R1,3-R2,5-R3,6-R4-PIPERIDIN-4-YL)-(CH2)N-CH<(-CH(-R6)- CH(-R5)-NH-CH(-R8)-CH(-R7)-) WHEREIN EACH OF R1, R2, R3, R4, R5, R6, R7 AND R8 INDEPENDENTLY IS HYDROGEN, HALOGEN, OR AN ALKYL CONTAINING FROM 1 TO 3 CARBON ATOMS; N IS A WHOLE NUMBER FROM 1 TO 12; A BIVALENT METAL OXIDE, I.E., MAGNESIUM OXIDE, CALCIUM OXIDE, OR LEAD MONOXIDE.
Inventors
- 👤 G Ceccato
- 👤 S Geri
- 👤 A Miglierina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462; C08K13/00; C08K13/02; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |