US3463657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving papermaker's felt
Assignee: FORSCHUNGSGEMEINSCHAFT DER DEU
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Filing: 1965-10-27
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Granted: 1969-08-26
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Expires: 1985-10-27
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/645; D04H1/44; D04H1/46; D04H1/48; D04H1/488; D04H1/587; D04H13/00; D21; D21F; D21F7/00; D21F7/08; D21F7/083; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2484
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |