Patent US3448169A successfully refreshed from Google Patents.
US3448169A
Expired / Lapsed
US
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Stabilization of acylated or alkylated polyoxymethylenes
Assignee: Bayer AG
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Filing: 1967-07-12
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Granted: 1969-06-03
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Expires: 1987-07-12
Abstract
No abstract record available.
Inventors
- 👤 Kuno Wagner
- 👤 Hans Scheurlen
- 👤 Helmuth Kritzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:10
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/0008; C08K5/005; C08K5/17; C08K5/36; C08K5/39
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |