Patent US3468819A successfully refreshed from Google Patents.
US3468819A
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Process for producing cellular polyurethanes,using alkyl or aryl acid phosphates
Assignee: Bayer Corp
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Filing: 1964-11-16
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Granted: 1969-09-23
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 John F Szabat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/08; C08G18/089; C08G18/4009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA661534A
Cited
US3042631A
Cited
US3105063A
Cited
US3034996A
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US3029208A
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US3067149A
Cited
US3245922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |