US3383351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes, reactive solutions and methods and their production
Assignee: Individual
•
Filing: 1964-08-12
•
Granted: 1968-05-14
•
Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Paul Stamberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F283/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4063; C08G18/62; C08G18/63; C08G18/632; C08G18/638
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |