US3657206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joining dead polymers
Assignee: Bridgestone Firestone Inc
•
Filing: 1969-10-08
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Granted: 1972-04-18
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Expires: 1989-10-08
Abstract
Abstract DEAD POLYMERS, WHETHER LIQUID OR SOLID, WITH A MOLECULAR WEIGHT OF 1,000 TO 2,000,000, DERIVED AT LEAST IN PART FROM A DIENE MONOMER, ARE JOINED WITH HALOGENATED JOINING AGENTS TO PRODUCE A RUBBER OF GREATER MOLECULAR WEIGHT. D R A W I N G
Inventors
- 👤 Adel F Halasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:22
CPC Classifications
C; C08; C08C; C08C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |