Armco Inc.
🏢 View company profile →227Patents
0Active
227Granted
43Portfolio score
Filing activity: Nov 7, 1974 → Jul 2, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5736709A | Descaling metal with a laser having a very short pulse width and high average power | Performing Operations; Transporting | 144 | Expired |
| US4446018A | Waste treatment system having integral intrachannel clarifier | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4550782A | Method and apparatus for independent support of well pipe hangers | Fixed Constructions | 101 | Expired |
| US4434971A | Drilling rig drawworks hook load overspeed preventing system | Performing Operations; Transporting | 82 | Expired |
| US4393859A | Solar collector roof | Emerging Cross-Sectional Technologies | 72 | Expired |
| US4609577A | Method of producing weld overlay of austenitic stainless steel | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4468551A | Laser treatment of electrical steel and optical scanning assembly therefor | Performing Operations; Transporting | 68 | Expired |
| US5045668A | Apparatus and method for automatically aligning a welding device for butt welding workpieces | Performing Operations; Transporting | 59 | Expired |
| US5292549A | Metallic coated steel having a siloxane film providing temporary corrosion protection and method therefor | Chemistry; Metallurgy | 59 | Expired |
| US4223346A | Automatic defect detecting inspection apparatus | Physics | 57 | Expired |
| US4439068A | Releasable guide post mount and method for recovering guide posts by remote operations | Fixed Constructions | 54 | Expired |
| US5433976A | Metal pretreated with an aqueous solution containing a dissolved inorganic silicate or aluminate, an organofuctional silane and a non-functional silane for enhanced corrosion resistance | Chemistry; Metallurgy | 45 | Expired |
| US4497592A | Self-levelling underwater structure | Fixed Constructions | 43 | Expired |
| US4667697A | Unitized check valve | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4427072A | Method and apparatus for deep underwater well drilling and completion | Fixed Constructions | 41 | Expired |
| US4642752A | Programmable automatic manipulator system | Performing Operations; Transporting | 40 | Expired |
| US4199847A | Well riser support having elastomeric bearings | Fixed Constructions | 40 | Expired |
| US4505614A | Cam arm centralizer | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4302499A | Moldable composite | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5326594A | Metal pretreated with an inorganic/organic composite coating with enhanced paint adhesion | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4330574A | Finishing method for conventional hot dip coating of a ferrous base metal strip with a molten coating metal | Chemistry; Metallurgy | 38 | Expired |
| US5322713A | Metal sheet with enhanced corrosion resistance having a silane treated aluminate coating | Chemistry; Metallurgy | 36 | Expired |
| US4192383A | Offshore multiple well drilling and production apparatus | Fixed Constructions | 33 | Expired |
| US4141929A | Unidirectional sheet molding composition and process of preparing same | Performing Operations; Transporting | 32 | Expired |
| US4241788A | Multiple cup downwell gas separator | Fixed Constructions | 32 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.