US3446771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyurethane elastomer
Assignee: Kuraray Co Ltd
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Filing: 1967-02-21
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Granted: 1969-05-27
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Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kanji Matsubayashi
- 👤 Takuo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; C08K; C08K5/00; C08K5/16; C08K5/20; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |