US2866762A
Expired / Lapsed
US
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Process for preparing polyurethane foams employing tertiary amine catalysts
Assignee: Bayer AG
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Filing: 1954-08-09
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Granted: 1958-12-30
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Brochhagen Franzkarl
- 👤 Koln Odenthal Bezirk
- 👤 Karl E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/6648; C08G2110/00; C08G2110/0008; C08G2110/0083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2683727A
Cited
US2597025A
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US2602783A
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US2650212A
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US2625531A
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US2764565A
Cited
US2625535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |