DETAILED ACTION
Notice of Pre-AIA or AIA Status
The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA .
Claim Rejections - 35 USC § 103
The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action:
A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made.
The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows:
1. Determining the scope and contents of the prior art.
2. Ascertaining the differences between the prior art and the claims at issue.
3. Resolving the level of ordinary skill in the pertinent art.
4. Considering objective evidence present in the application indicating obviousness or nonobviousness.
Claim(s) 1-20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Motoyama et al. (US20190263056A1).
Regarding Claims 1, 7 and 12, Ootaki teaches a steel sintered body (shaped article, abstract) comprising:
A base (substrate) made by high-speed steel; (See claim 9)
and a solidified layer (steel material used for the build portion) made of high-speed steel whose composition is different from the base (See claim 9); the spread powder layer over the substrate of the is considered to read on a solidified layer continuously disposed on the surface of the base;
Regarding the claim limitation of the boundary between the base and solidified layer not being visually identified in a 200X magnified observation image of a section intersecting the image; Motoyama only shows a backscattered electron image of the interface (Fig 5) but not a photo from an optical microscope as used in the disclosure of the present invention. However, as Motoyama teaches the interface is a compositionally graded layer closer to the composition of the substrate toward the substrate [0161], and the products are formed by controlled thin layers of powder additively laminated (See claim 1) is considered similar to the disclose method [0062]; one of ordinary skill in the art would have expected a similar visual boundary to be present at the interface under the expectation that products formed by substantially similar methods have similar properties. (See MPEP 2112.01(I));
Regarding the method limitations of Claim 7, the step of forming each powder layer by melting powder [0051] reads on forming a cladding portion and solidifying each layer; where the step of forming first begins by spreading the powder [0039]; then irradiating powder layer with a scanning layer beam to a temperature sufficient to melt and solidify the cladding which is considered to be significantly above 130 C and the temperature of the first surface is considered to be higher than a martensitic finish temperature of the base (reading on claim 12)
Regarding claim 2, Motoyama teaches no cracks are present [0146] (Table 3)
Regarding Claims 3, 9 and 16, Motoyama teaches the base has a carbon content of 0.6% (Table 1, YXR3), reading on the claimed range of 0.5-0.9%
Regarding Claims 4 and 17, Motoyama teaches the base contains 1.8% V, 4.3% Cr, 2.9% Mo, and 0.4% Mn and 1.5% Si (Table 1, YXR3) reading on element group (1) of 2-4% V, 3-15% Cr, 0.5-4% Mo; and element group (2) of 0.2-1% Mn, 0.2-4% V, 3-15% Cr, 0.5-4% Mo and 0-2.5% Si.
Regarding Claims 5, 10 and 18-20, the solidified layer has a C content of 0.9% (M2 of Table 1) reading on 0.5-1.5% C.
Regarding Claim 6, the solidified layer comprises: 0.2% Si, 0.3% Mn, 4.3% Cr, 6% W, 5.1% Mo and 1.8% V (M2 of Table 1) reading on the claimed range of 0-1% Mn, 1-3% V, 3-5.5% Cr, 4-6% Mo, and 5-7.5% W.
Regarding Claim 8, as the base and layer materials of the prior art read on the claimed compositions for both (Table 1), one of ordinary skill in the art would expect the respective base and layer materials to have a similar difference in martensitic start temperatures under the expectation that similar products have similar properties. (See MPEP 2112.01(I))
Regarding Claim 13, it is interpreted that the energy density of the laser used for each layer is the same for each layer including a second to last layer formed (See Table 2)
Regarding Claim 14, it is interpreted the height of each layer (layer pitch) is the same for each layer [0135]
Regarding Claim 15, the prior art teaches a laser power of 100-300 W [0057] overlapping with the claimed range of 300 W or more, in the case where a claim overlaps with a range taught by the prior art, a prima facie case of obviousness exists for the claimed range. (See MPEP 2144.05(I))
Any inquiry concerning this communication or earlier communications from the examiner should be directed to RICARDO D MORALES whose telephone number is (571)272-6691. The examiner can normally be reached Monday-Thursday 9 am- 4 pm.
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/RICARDO D MORALES/Primary Examiner, Art Unit 1738
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