Patent US3454535A successfully refreshed from Google Patents.
US3454535A
Expired / Lapsed
US
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Filaments,threads and fibers of polyamides from n-mono-(sulfonalkyl)-alkylenediamine
Assignee: Bayer AG
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Filing: 1965-01-21
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Granted: 1969-07-08
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand Bodesheim
- 👤 Gunther Nawrath
- 👤 Gunther Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; C08G69/02; C08G69/26; C08L; C08L77/00; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |