PATENT CLAIM ANALYSIS

Application Number: 15878492
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["585", "818000"]

Abstract:
The invention relates to a process for recovering methane from digester biogas or landfill gas. More specifically, the invention pertains to biomethane production that substantially removes carbon dioxide from a digester biogas or landfill gas using first, second, and third purification stages each comprising one or more membranes selective for carbon dioxide over methane. A retentate from the first stage is separated by the one more membranes of the second stage into a second state retentate, forming a biomethane product gas. A permeate from the first stage is separated by the one or more membranes of the third stage into a third stage retentate and a third stage permeate. Recovery of methane from the biogas is boosted by feeding the third stage retentate to the first purification stage. The recovery may be optionally further boosted by compressing the second stage permeate with the biogas at a main compressor.

Claim (Index 33):
The installation of  claim 29 , wherein the separation layer is made of a copolymer or block polymer of tetramethylene oxide, propylene oxide, and/or ethylene oxide.

Metadata:
- Claim Count in Document: 56.0
- Percentile: 86.0
- Lexical Diversity: 2.35821
- Patent Class: 585.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15711571', '15022309', '15037198', '15462004', '13807831']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7376516687846825
- 35 USC 102 Novelty (BERT): 0.554852032082351
- Combined Prediction Score: 0.7193717051144494
- Mean Citation Score: 339.920278
- Max Citation Score: 435.2796
- Similarity Product: 313.7393318218232

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test