Packaging material for cooking food
US-12035840-B2 · Jul 16, 2024 · US
Ventilation or drainage of bags
Ventilation or drainage of bags · 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 | B65D33/01 |
| Official title | Ventilation or drainage of bags |
| Display label | Ventilation or drainage of bags |
| Total patents | 229 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 16 |
| 2017 | 21 |
| 2018 | 19 |
| 2019 | 24 |
| 2020 | 35 |
| 2021 | 20 |
| 2022 | 24 |
| 2023 | 17 |
| 2024 | 20 |
| 2025 | 12 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Flexible laminate structure with integrated one-way valve
US-10138024-B2 · Nov 27, 2018 · US
Humidity-management packaging systems and methods
US-2018250116-A1 · Sep 6, 2018 · US
Non-uniformly perforated plastic bag
US-9845188-B2 · Dec 19, 2017 · US
Packaged article
US-2017341819-A1 · Nov 30, 2017 · US
Stand-up plastic storage bag
US-2017327288-A1 · Nov 16, 2017 · US
Non-uniformly perforated plastic bag
US-2017305651-A1 · Oct 26, 2017 · US
One-Way Valve Score Design
US-2017307091-A1 · Oct 26, 2017 · US
Integrated One-Way Valve with Polyol Film
US-2017283136-A1 · Oct 5, 2017 · US
Steam release standing pouch and content-enclosing standing pouch
US-9776769-B2 · Oct 3, 2017 · US
Stand-up plastic storage bag having shift regions and a cuff line
US-9776781-B2 · Oct 3, 2017 · US
Customization Kit For Articles Of Footwear
US-2017245598-A1 · Aug 31, 2017 · US
Evacuated bag with mattress and reuse of resealed bag after release of vacuum
US-2017190494-A1 · Jul 6, 2017 · US
Stand-up plastic storage bag
US-2017166375-A1 · Jun 15, 2017 · US
Gas evacuation system and method
US-9663259-B2 · May 30, 2017 · US
Stand-up plastic storage bag
US-9630760-B2 · Apr 25, 2017 · US
Ribbed film structures with pigment created visual characteristics
US-9604429-B2 · Mar 28, 2017 · US
Ribbed film structures with voiding agent created visual characteristics
US-2017080623-A1 · Mar 23, 2017 · US
Ribbed film structures with pigment created visual characteristics
US-2017080622-A1 · Mar 23, 2017 · US
Stand-up plastic storage bag
US-2017057718-A1 · Mar 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B65D33/01?
- CPC B65D33/01 is the Cooperative Patent Classification code for “Ventilation or drainage of bags.”
- How many patents are filed under CPC B65D33/01 (Ventilation or drainage of bags)?
- Our database includes 229 publications tagged with this CPC code.
- Is patent activity under CPC B65D33/01 growing?
- Publication counts under this code: 20 in 2024 vs 12 in 2025 (latest complete years).