Patent No. US10857948 (titled "Convertible Vehicle Storage Container") was filed by Lim Stephen Sophorn on Mar 11, 2019.
’948 is related to the field of vehicle storage solutions , specifically addressing the need for increased cargo space in vehicles equipped with roof rack systems. The background involves existing storage products that often lack versatility, either by being permanently attached to a specific vehicle or by not offering a compact storage solution when not in use. This invention aims to overcome these limitations by providing a convertible storage container.
The underlying idea behind ’948 is to create a vehicle storage container that can be easily collapsed into a flat, compact form when not needed, and quickly expanded into a rigid, enclosed container for use. This is achieved through a hinged panel design where the side, front, and rear panels fold inward onto a base panel. A flexible sliding door, stowed beneath the base when collapsed, provides enclosure when the container is erected.
The claims of ’948 focus on a vehicle storage container designed for roof rack mounting, comprising a base panel, front panel, rear panel, two side panels, and a flexible sliding door. The key feature is its ability to convert into a smaller structure. Claim 1 emphasizes the sequential opening of the side panels followed by the front and rear panels, which then latch together. Claim 2 highlights the flexible sliding door's movement from beneath the base to enclose the structure.
In practice, the container is erected by first unfolding the side panels outward, followed by raising the front and rear panels. Latches secure the corners where the panels meet, creating a rigid box. The flexible sliding door, guided by tracks along the base and side panels, then slides into place to enclose the storage space. When not in use, the process is reversed: the latches are released, the panels are folded inward, and the sliding door is stowed beneath the base, resulting in a flat, easily storable package.
This design differentiates itself from prior solutions by offering both easy mounting on various vehicles with roof racks and a compact storage option when not in use. Unlike permanently mounted or vehicle-specific storage solutions, this convertible container provides versatility and convenience. The flexible sliding door, stowing neatly beneath the base, further contributes to the container's compact form factor when collapsed, a feature not commonly found in existing vehicle storage products.
In the late 2010s when ’948 was filed, at a time when vehicle storage solutions were typically implemented using fixed-size containers or complex mechanical folding mechanisms, when systems commonly relied on rigid materials and structures rather than flexible or adaptable designs, and when hardware or software constraints made achieving a compact, easily convertible storage container non-trivial.
The examiner approved the application because the applicant's amendment combined allowable features with their base claims. This combination made the application patentable over the existing prior art.
There are two claims in total, with claims 1 and 2 being independent. The independent claims focus on a vehicle storage container that mounts on a roof rack and can convert into a smaller structure, detailing the movement of panels and the role of a flexible sliding door. There are no dependent claims.
Definitions of key terms used in the patent claims.

The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
Get instant alerts for new documents