US3421932A
Expired / Lapsed
US
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Method and apparatus for preparing cellular polyurethane plastics
Assignee: Bayer Corp
•
Filing: 1965-12-16
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Granted: 1969-01-14
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Expires: 1985-12-16
Abstract
No abstract record available.
Inventors
- 👤 William A Mcgregor Jr
- 👤 Paul G Gemeinhardt
- 👤 Jesse Fred Gurley
- 👤 Edward L Reichard
- 👤 William F Gauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; B05; B05D; B05D1/00; B05D1/30; B05D1/305; Y; Y10; Y10S; Y10S118/00; Y10S118/04; Y10S521/00; Y10S521/917
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |