Not legal advice. Every status label is a research signal with source links and confidence notes. Research signal only. Google Patents lists the record as active; do not copy active claims.
PatentWake Report: US5597589A
Likely expired
SLS Powder 3D Printing Systems
SLS allows printing of highly functional, complex nylon parts without support structures. Expiration in 2014 drove commercial machine costs down from $100k to under $10k.
Known product proofBoard
Patent language gapUS5597589A
Builder wedge3D Printing
Status stanceLikely expired
System & Commercial Flowchart
Flowchart maps original claims, open-source workarounds, and modern product interfaces.
Mockup Imagination ("Built Product")
Visual concept depicting how this technology looks wrapped in a clean, modern user dashboard.
SLS allows printing of highly functional, complex nylon parts without support structures. Expiration in 2014 drove commercial machine costs down from $100k to under $10k.
Plain-English Opportunity
Verified Expired Case Study
Patent is dead. Market is alive.
Important framing: Day 1 usable means the original patent right is expired or no longer licensed, but builders still need to check newer related patents, trademarks, safety rules, and country specific status.
The Commercial Hook
Here is a business you can build now because this patent barrier is gone:
Lower cost desktop SLS machines
Alternative powder material supply lines
On-demand small batch parts service bureau
Dental and product prototype automation software
B2B quote engines for sintered parts
1. What Expired
Apparatus and method patents for selective laser sintering of powders.
2. Why It Mattered
It was the gatekeeper for support-free 3D printing of functional structural parts, keeping machines restricted to industrial giants.
3. What Changed After Expiration
Expiration in 2014 allowed startup companies to launch desktop-sized SLS printers for a fraction of the cost, making industrial-grade nylon printing accessible.
4. What Can Be Built Day 1
Low-cost desktop-format SLS machines
Powder material supply (Nylon-12, TPU, metal powders)
Local service bureau for small-batch functional parts
SLS systems require strict heating control and high-powered lasers. Builders must check safety guidelines (IEC 60825-1 laser safety standards) and confirm powder containment ventilation.
Timing & Search Trend
Google Search Volume Momentum
🔥 Explosive Growth (+180% MoM)
Note: Search curves show search fomo index, representing global builder query volume shifts in the past 8 months.
Build Path
Adjacent ideas, not active-claim copying.
1
Lower cost desktop SLS machines
Start narrow, validate demand, and keep patent review separate.
2
Alternative powder material supply lines
Start narrow, validate demand, and keep patent review separate.
3
On-demand small batch parts service bureau
Start narrow, validate demand, and keep patent review separate.
4
Dental and product prototype automation software
Start narrow, validate demand, and keep patent review separate.
5
B2B quote engines for sintered parts
Start narrow, validate demand, and keep patent review separate.
PatentWake compresses months of research, validation and building into a single weekend - and then helps you turn it into your next cash flowing asset.
