US3523093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing polyurethanes by reacting polyisocyanate with a preformed polymer resulting from polymerization of ethylenically unsaturated monomers
Assignee: Individual
•
Filing: 1964-09-03
•
Granted: 1970-08-04
•
Expires: 1984-09-03
Abstract
No abstract record available.
Inventors
- 👤 Paul Stamberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F283/00; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/166; C08G18/168; C08G18/28; C08G18/40; C08G18/4009; C08G18/4027; C08G18/4063; C08G18/48; C08G18/4829; C08G18/54; C08G18/544; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/6245; C08G18/6262; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/005
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |