Description
Class D21F : PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
Subclass 1/04: Wet end of machines for making continuous webs of paper Head boxes of cylinder machines
D21F 1/04
Sub-Class
Stats
- 7 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 6 Total Patent Owners
- 49 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10077530 | Sheet former | Jul 21, 15 | Sep 18, 18 | BS Co., Ltd. |
| 7776184 | Arrangement for the treatment of cellulose pulp in a washing apparatus adapted to facilitate service and inspection of the apparatus | Jun 02, 06 | Aug 17, 10 | VALMET TECHNOLOGIES, INC. |
| 7393434 | Method and device for stabilizing unseamed loops | May 22, 03 | Jul 01, 08 | ALBANY INTERNATIONAL CORP. |
| 6521094 | Device for the treatment of a fibrous suspension | Sep 07, 01 | Feb 18, 03 | OVIVO LUXEMBOURG S.A.R.L. |
| 6319362 | Method and equipment for controlling properties of paper | Nov 17, 98 | Nov 20, 01 | METSO PAPER AUTOMATION OY |
| 6303003 | Method and apparatus for drying a moist web | Feb 23, 99 | Oct 16, 01 | Not available |
| 6139690 | Former with a floating upper lip | Jun 30, 98 | Oct 31, 00 | Voith Sulzer Papiermaschinen GmbH |
Recent Publications
Not Available
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 33 Months (last 2 years Issuances)
- 33 Months (last 5 years Issuances)