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US3449256A
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Methylenebis(phenyl isocyanate) compositions and preparation thereof
Assignee: Pharmacia and Upjohn Co
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Filing: 1966-01-19
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Granted: 1969-06-10
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Expires: 1986-01-19
Abstract
No abstract record available.
Inventors
- 👤 William J Farrissey Jr
- 👤 Alec Odinak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:17
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/18; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |