Patent US3402220A successfully refreshed from Google Patents.
US3402220A
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US
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Homogeneous blend of uncured butyl and cured chlorobutyl rubbers
Assignee: Primerica Inc
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Filing: 1965-12-27
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Granted: 1968-09-17
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Bierman Clarence Robert
- 👤 Fourier Walter Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:23
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2593681A
Cited
US2903437A
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US2948700A
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US3076777A
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US3057390A
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US3145189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |