US4191304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure tank for hot-water heaters
Assignee: Stiebel Eltron GmbH and Co KG
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Filing: 1978-02-22
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Granted: 1980-03-04
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Expires: 1998-02-22
Abstract
Abstract A pressure tank, particularly for hot-water heaters, with a synthetic liner and a glass fiber wrapping reinforcing it. The glass fiber wrapping is fixed to individual positions of the liner by means of synthetic material located at these positions. At the same time, the glass fiber wrapping may be held to the liner by means of a foamed, heat-insulating synthetic layer placed around the glass fiber wrapping. The synthetic material may also be eliminated if desired.
Inventors
- 👤 Heinz Schiedat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:13
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/602; F; F17; F17C; F17C1/00; F17C1/12; F17C1/16; F24; F24H; F24H1/00; F24H1/18; F24H1/181; B29K; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/712; B29L2031/7154; B29L2031/7156; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0634; F17C2203/0658; F17C2203/066; F17C2203/0663; F17C2205/00; F17C2205/01; F17C2205/0103; F17C2205/0111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a continuous glass fiber wrapping free of synthetic resin for reinforcing said liner and in direct contact with said liner; an outer container shell spaced from said wrapping: and a synthetic foamed, heat-insulating layer between said wrapping and said shell and around said wrapping holding said wrapping to said liner, said wrapping being held against said liner and itself solely by said heat insulating means.
Claim 2
Dependent Claim
77 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a continuous glass fiber wrapping free of synthetic resin for reinforcing said liner and in direct contact with said liner; an outer container shell spaced from said wrapping: and a synthetic foamed, heat-insulating layer between said wrapping and said shell and around said wrapping holding said wrapping to said liner, said wrapping being held against said liner and itself solely by said heat insulating means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |