Patent US2801230A successfully refreshed from Google Patents.
US2801230A
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Polyisocyanate cyclic urea derivative reaction products
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-09-02
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Granted: 1957-07-30
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Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 George L Fraser
- 👤 Robert M Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3842; C08G18/3848; Y; Y10; Y10S; Y10S528/00; Y10S528/902; Y10S528/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A POLYMERIC HEAT REACTION PRODUCT OF A CYCLIC UREA DERIVATIVE HAVING THE FORMULA:
Claim 2
Dependent Claim
13 words
A POLYMERIC HEAT REACTION PRODUCT OF A CYCLIC UREA DERIVATIVE HAVING THE FORMULA:
References Cited (Backward Citations)
US2343808A
Cited
FR951486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |