Description
PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F
Technology
Stats
- 2,313 US PATENTS IN FORCE
- 570 US APPLICATIONS PENDING
- 1,035 Total Patent Owners
- 6,746 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Wet end of machines for making continuous webs of paper |
| 1/02 | Wet end of machines for making continuous webs of paper Head boxes of Fourdrinier machines |
| 1/04 | Wet end of machines for making continuous webs of paper Head boxes of cylinder machines |
| 1/06 | Wet end of machines for making continuous webs of paper Regulating pulp flow |
| 1/08 | Wet end of machines for making continuous webs of paper Regulating consistency |
| 1/10 | Wet end of machines for making continuous webs of paper Wire-cloths |
| 1/12 | Wet end of machines for making continuous webs of paper Wire-cloths Seams thereof |
| 1/14 | Wet end of machines for making continuous webs of paper Wire-cloths Seams thereof welded |
| 1/16 | Wet end of machines for making continuous webs of paper Wire-cloths Seams thereof sewn |
| 1/18 | Wet end of machines for making continuous webs of paper Shaking-apparatus for wire-cloths and associated parts |
| 1/20 | Wet end of machines for making continuous webs of paper Shaking-apparatus for wire-cloths and associated parts in Fourdrinier machines |
| 1/22 | Wet end of machines for making continuous webs of paper Shaking-apparatus for wire-cloths and associated parts in cylinder machines |
| 1/24 | Wet end of machines for making continuous webs of paper Tilting, raising, or lowering mechanisms for wire-cloths |
| 1/26 | Wet end of machines for making continuous webs of paper Tilting, raising, or lowering mechanisms for wire-cloths in Fourdrinier machines |
| 1/28 | Wet end of machines for making continuous webs of paper Tilting, raising, or lowering mechanisms for wire-cloths in cylinder machines |
| 1/30 | Wet end of machines for making continuous webs of paper Protecting wire-cloths from mechanical damage |
| 1/32 | Wet end of machines for making continuous webs of paper Washing wire-cloths or felts |
| 1/34 | Wet end of machines for making continuous webs of paper Construction or arrangement of spraying pipes |
| 1/36 | Wet end of machines for making continuous webs of paper Guiding mechanisms |
| 1/38 | Wet end of machines for making continuous webs of paper Guiding mechanisms Pads |
Recent Patents
Not Available
Recent Publications
Not Available
Top Owners in This Class
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Applications Filed in This Class - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 32 Months (last 2 years Issuances)
- 32 Months (last 5 years Issuances)