US3531445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrogenating polymers
Assignee: Bridgestone Corp
•
Filing: 1969-04-15
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Granted: 1970-09-29
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Expires: 1989-04-15
Abstract
No abstract record available.
Inventors
- 👤 Toshio Yoshimoto
- 👤 Seiya Kaneko
- 👤 Hiroshi Yoshii
- 👤 Takashi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2693461A
Cited
US2864809A
Cited
US2997433A
Cited
US3205278A
Cited
BE651281A
Cited
GB1020720A
Cited
BE658543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |