US3509009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabric
Assignee: Carl Freudenberg KG
•
Filing: 1967-02-06
•
Granted: 1970-04-28
•
Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:32
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08; D04H5/10; A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0237; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; D01D5/253; D04H3/00; D04H3/005; D04H3/08; D04H3/16; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/611; Y10T442/69; Y10T442/692; Y10T442/697
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1786669A
Cited
US2188332A
Cited
US2336743A
Cited
US2336745A
Cited
US2411660A
Cited
US2522527A
Cited
US2688380A
Cited
US2810426A
Cited
US2861319A
Cited
US3314840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |