US3433751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether polyol composition and polyurethane foams produced therefrom
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1966-02-01
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Granted: 1969-03-18
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Masaru Yotsuzuka
- 👤 Akizo Keshi
- 👤 Norishige Hashimoto
- 👤 Katsuhisa Kodama
- 👤 Shigenobu Nakahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:21
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA734988A
Cited
US3042631A
Cited
US3194773A
Cited
US3067148A
Cited
US3164558A
Cited
US3265641A
Cited
FR1378039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |