Inventor
Ralph E. Roper
Inventor
Indianapolis, IN, US
Overview
Patents· 26 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B21Dprimary
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material18%
Y10TTechnical subjects covered by former us classification15%
B01DSeparation8%
B60GVehicle suspension arrangements8%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds6%
A62DChemical means for extinguishing fires or for combating or protecting against harmful chemical agents5%
C01BNon-metallic elements5%
C22BProduction and refining of metals5%
F16FSprings5%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy5%
PatentTitleYear
9,073,008'Use of ferrous sulfide suspension for the removal of mercury from flue gases'20159,034,285'Use of ferrous sulfide suspension for the removal of mercury from flue gases'20157,938,766'Calcium-sodium polysulfide chemical reagent and production methods'20117,767,188'Calcium-sodium polysulfide chemical reagent and production methods'20107,534,413'Calcium-sodium polysulfide chemical reagent and production methods'20097,144,362'Method for chemically stabilizing waste materials containing multivalent oxyanions'20066,622,831'Soft-start, soft-return gas spring'20036,390,457'Soft-start, soft-return gas spring'20026,068,245'Apparatus and method for cushioning the action of draw dies operating in a stamping press and the like'20005,890,387'Apparatus and method for forming and hydropiercing a tubular frame member'19995,865,054'Apparatus and method for forming a tubular frame member'19995,802,898'Apparatus for forming a tubular frame member'19985,533,372'Controlled material flow hydroforming'19965,499,520'Apparatus for forming a tubular frame member'19965,481,892'Apparatus and method for forming a tubular member'19965,372,026'Apparatus and method for hydroforming sheet metal'19945,372,027'Controlled material flow hydroforming'19945,353,618'Apparatus and method for forming a tubular frame member'19945,239,852'Apparatus and method for forming a tubular frame member'19935,157,969'Apparatus and method for hydroforming sheet metal'19924,738,695'Gas removal system'19884,576,030'Stretch form die'19864,536,931'Bearing burnishing method and apparatus'19854,295,357'Apparatus for making metal outers and inners'19814,238,949'Process and apparatus for making metal outers and inners'19804,062,215'Process for expanding wheel components'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1986Patents assigned to WALLACE EXPANDING MACHINES (3)· patent assignee history
1977–2003Based in Indianapolis, IN, US· patent location history
1980–1981Patents assigned to GEN TIRE & RUBBER CO (2)· patent assignee history
1988–2015Based in Carmel, IN, US· patent location history
1992–1994Patents assigned to PRICE ENTERPRISES LTD (5)· patent assignee history
1992–1994Patents assigned to ARMCO STEEL CO LP (4)· patent assignee history
1996–1999Patents assigned to AQUAFORM INC (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PRICE ENTERPRISES LTD | 5 | 1992–1994 |
| AQUAFORM INC | 4 | 1996–1999 |
| ARMCO STEEL CO LP | 4 | 1992–1994 |
| WALLACE EXPANDING MACHINES | 3 | 1977–1986 |
| GEN TIRE & RUBBER CO | 2 | 1980–1981 |
Locations
| Location | Patents | Span |
|---|---|---|
| Indianapolis, IN, US | 19 | 1977–2003 |
| Carmel, IN, US | 7 | 1988–2015 |