Patent US3020139A successfully refreshed from Google Patents.
US3020139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive product
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1960-04-18
•
Granted: 1962-02-06
•
Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 John E Camp
- 👤 Jr Josef C Mueller
- 👤 Frederick G Sandholdt
- 👤 George L Haywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:20
CPC Classifications
D; D04; D04H; D04H1/00; B; B24; B24D; B24D13/00; B24D18/00; B24D18/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
AN ARTICLE OF MANUFACTURE COMPRISING: A THREE-DIMENSIONAL OPEN NON-WOVEN WEB HAVING SUBSTANTIAL LOFT AND A HIGH PORPORTION OF INTERNAL VOIDS FORMED BY LAYING
Claim 2
Dependent Claim
23 words
AN ARTICLE OF MANUFACTURE COMPRISING: A THREE-DIMENSIONAL OPEN NON-WOVEN WEB HAVING SUBSTANTIAL LOFT AND A HIGH PORPORTION OF INTERNAL VOIDS FORMED BY LAYING
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |