Patent US1902466A successfully refreshed from Google Patents.
US3394047A
Expired / Lapsed
US
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Process of forming water-laid felts containing hollow-viscose, textile, and synthetic fibers
Assignee: Glanzstoff AG
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Filing: 1964-07-20
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Granted: 1968-07-23
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Sommer Erwin
- 👤 Gerlach Klaus
- 👤 Boehme Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H13/00; D21H13/02; D21H13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |