Patent US3486970A successfully refreshed from Google Patents.
US3486970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Embossed polyacrylonitrile fiber paper
Assignee: Bayer AG
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Filing: 1965-10-27
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Granted: 1969-12-30
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Expires: 1985-10-27
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Troemel
- 👤 Ernst Heintze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:05
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D21; D21F; D21F1/00; D21F1/44; D21H; D21H27/00; D21H27/02; D21H13/00; D21H13/10; D21H13/12; D21H13/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2689199A
Cited
US2784135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |