Patent US3428598A successfully refreshed from Google Patents.
US3428598A
Expired / Lapsed
US
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Polyurethane elastomer compositions
Assignee: Kuraray Co Ltd
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Filing: 1966-08-31
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Granted: 1969-02-18
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kanji Matsubayashi
- 👤 Hiroyuki Segawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA665356A
Cited
US2915496A
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US3067149A
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US3072605A
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US3179625A
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US3193525A
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US3280049A
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US3352822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |