Patent US3423344A successfully refreshed from Google Patents.
US3423344A
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Polyurethane polyol mixture containing hydroxyalkylated polyamines
Assignee: Pharmacia and Upjohn Co
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Filing: 1967-08-15
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Granted: 1969-01-21
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Expires: 1987-08-15
Abstract
No abstract record available.
Inventors
- 👤 Alec Odinak
- 👤 Harold E Reymore Jr
- 👤 Adnan A R Sayigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/546; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR79511E
Cited
US2683730A
Cited
GB910333A
Cited
GB967359A
Cited
US2950263A
Cited
FR1233862A
Cited
US3159591A
Cited
US3175007A
Cited
US3186969A
Cited
US3245924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |