Bag containing a reference fluid
US-2019361038-A1 · Nov 28, 2019 · US
with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03)
with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03) · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B65D31/04 |
| Official title | {with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03)} |
| Display label | with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03) |
| Total patents | 133 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 11 |
| 2017 | 17 |
| 2018 | 13 |
| 2019 | 14 |
| 2020 | 13 |
| 2021 | 9 |
| 2022 | 11 |
| 2023 | 12 |
| 2024 | 11 |
| 2025 | 12 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Container Blanks for Flexible Packages and Methods of Making Flexible Packages
US-2019352068-A1 · Nov 21, 2019 · US
Bag with zipper tape and method for producing same
US-10450106-B2 · Oct 22, 2019 · US
Polymeric bags and method to make same
US-2019315567-A1 · Oct 17, 2019 · US
Bag containing a reference fluid
US-10359437-B2 · Jul 23, 2019 · US
Abrasion resistant film for biocontainers
US-2019210321-A1 · Jul 11, 2019 · US
Abrasion resistant film for biocontainers
US-10272639-B2 · Apr 30, 2019 · US
Polymeric bags and method to make same
US-2019092564-A1 · Mar 28, 2019 · US
Impact resistant liquid bladders
US-10227170-B2 · Mar 12, 2019 · US
Multi-layered bags with discrete non-continuous lamination
US-10196176-B2 · Feb 5, 2019 · US
Flexible container with pop-up spout
US-10173813-B2 · Jan 8, 2019 · US
Reinforced radiological containment bag
US-10157689-B2 · Dec 18, 2018 · US
Methods of adding expansion material to flexible containers
US-2018312283-A1 · Nov 1, 2018 · US
Sampling bag and funnel for collection of soils, muds, or other solids or liquids for subsequent analysis of headspace gases and other content
US-10077139-B2 · Sep 18, 2018 · US
Non-continuously laminated structures of thermoplastic films with differing material compositions and functional material properties
US-2018244433-A1 · Aug 30, 2018 · US
Protective cover for rotor and associated shipping apparatuses
US-2018222666-A1 · Aug 9, 2018 · US
Liquid storage container and method for folding the container
US-2018162620-A1 · Jun 14, 2018 · US
Method of packing silicon and packing body
US-9988188-B2 · Jun 5, 2018 · US
Package with integrally formed handle and method of making the same
US-9932149-B2 · Apr 3, 2018 · US
Flexible Container with Pop-up Spout
US-2018086515-A1 · Mar 29, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B65D31/04?
- CPC B65D31/04 is the Cooperative Patent Classification code for “with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03).”
- How many patents are filed under CPC B65D31/04 (with multiple walls (B65D81/3881 takes precedence; for shock absorbing purposes B65D81/03))?
- Our database includes 133 publications tagged with this CPC code.
- Is patent activity under CPC B65D31/04 growing?
- Publication counts under this code: 11 in 2024 vs 12 in 2025 (latest complete years).