Patent US4148746A successfully refreshed from Google Patents.
Patent US3549470A successfully refreshed from Google Patents.
US3549470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrillated yarn carpet backing
Assignee: Celanese Corp
•
Filing: 1967-01-03
•
Granted: 1970-12-22
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Emmett F Greenwald
- 👤 Richard A Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:22
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/125; Y; Y10; Y10S; Y10S264/00; Y10S264/08; Y10S264/47; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/31504; Y10T428/31725; Y10T428/31786; Y10T428/31855; Y10T428/31938; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3089; Y10T442/40; Y10T442/425; Y10T442/431
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3003304A
Cited
US2948927A
Cited
US3227784A
Cited
US3227664A
Cited
US3210239A
Cited
US3227794A
Cited
US3277221A
Cited
US3403203A
Cited
US3283788A
Cited
GB1114151A
Cited
US3405516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |