Patent US3441541A successfully refreshed from Google Patents.
US3441541A
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Fully capped polymethylene polyphenyl isocyanates
Assignee: ADNAN A R SAYIGH
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Filing: 1966-10-17
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Granted: 1969-04-29
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Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Victor V D Ancicco
- 👤 Adnan A R Sayigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/80; C08G18/8061; C08G18/807
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA665495A
Cited
US2801990A
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US2683730A
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US3080368A
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GB874430A
Cited
US3248371A
Cited
US3211585A
Cited
US3245961A
Cited
US3271170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |