Patent US3813757A successfully refreshed from Google Patents.
US3813757A
Expired / Lapsed
US
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Method of coating a vacuum bottle
Assignee: THERMOS Co A CORP OF
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Filing: 1971-09-01
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Granted: 1974-06-04
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Expires: 1991-09-01
Abstract
Abstract A vacuum bottle having a plastic coated or lined vacuum filler unit and method of lining such a vacuum filler. In connection with the method of lining the filler, before the filler is evacuated it is heated and a granular or powdered thermoplastic material is placed on the surface that is to be lined. The filler is then evacuated and sealed so that its heated walls will retain the heat sufficiently to insure good fusion of the plastic coating.
Inventors
- 👤 V Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:09
CPC Classifications
A; A47; A47J; A47J41/00; A47J41/02; A47J41/022; A47J41/024; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/49888
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
The method of forming a coated vacuum bottle comprising the sequential steps of forming a double walled vessel with a space between the walls, heating the vessel, applying a granular thermoplastic coating material to the area of said vessel to be coated, the vessel being heated to a temperature sufficient to fuse and level the granular thermoplastic coating material, evacuating the space between the walls, sealing the evacuated space between the walls to maintain the vacuum therebetween for retaining the heat therein to continue the fusion and leveling of the coating, and permitting the heated vessel to cool to ambient temperature.
Claim 2
Independent Claim
101 words
The method of forming a coated vacuum bottle comprising the sequential steps of forming a double walled vessel with a space between the walls, heating the vessel, applying a granular thermoplastic coating material to the area of said vessel to be coated, the vessel being heated to a temperature sufficient to fuse and level the granular thermoplastic coating material, evacuating the space between the walls, sealing the evacuated space between the walls to maintain the vacuum therebetween for retaining the heat therein to continue the fusion and leveling of the coating, and permitting the heated vessel to cool to ambient temperature.
Claim 3
Dependent Claim
29 words
The method of forming a coated vacuum bottle as set forth in claim 1 wherein the coating is applied to a space formed by the innermost of the walls.
Claim 4
Dependent Claim
48 words
The method of forming a coated vacuum bottle as set forth in claim 2 wherein the coating extends across an open mouth formed by the walls in an area where they are joined and extends for a portion of the area of the outermost wall adjacent the mouth.
Claim 5
Dependent Claim
48 words
The method of forming a coated vacuum bottle as set forth in claim 3 wherein the coating is applied to the open mouth and the adjacent surface of the outer wall by dipping the vessel into the coating material when the coating material is in the granular form.
References Cited (Backward Citations)
US1880358A
Cited
US2643021A
Cited
US3016159A
Cited
US3207358A
Cited
US3291631A
Cited
US3258147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |