US3477094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the continuous removal of volatile constituents from polyamides
Assignee: BASF SE
•
Filing: 1965-04-30
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Granted: 1969-11-11
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Paul Maahs
- 👤 Hans-Georg Matthies
- 👤 Friedrich Wenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:02
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/103; B; B01; B01D; B01D19/00; B01D19/0021; C; C08; C08G; C08G69/00; C08G69/46; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S159/35
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |