Patent US3298964A successfully refreshed from Google Patents.
Patent US3667641A successfully refreshed from Google Patents.
US3667641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reservoir cover arrangement
Assignee: Individual
•
Filing: 1970-03-02
•
Granted: 1972-06-06
•
Expires: 1990-03-02
Abstract
Abstract A reservoir is provided with a flexible, floating, cover secured to the sides of the reservoir along a line located between the anticipated upper and lower levels which water or other liquid in the reservoir may assume whereby the cover will remain in contact with the surface of the liquid as its level fluctuates up and down. A drain extending through the wall of the reservoir is arranged to draw off any rain or melted snow accumulating on the upper surface of the cover.
Inventors
- 👤 Howard S Dial
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:15
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/76; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower limit levels, a cover for said reservoir in the form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and a drain line passing through said side wall of the reservoir and communicating with the space between the interior of said side wall and the exterior of the cover at a point located adjacent but above the line at which said cover is secured to the side wall.
Claim 2
Dependent Claim
140 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower limit levels, a cover for said reservoir in the form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and a drain line passing through said side wall of the reservoir and communicating with the space between the interior of said side wall and the exterior of the cover at a point located adjacent but above the line at which said cover is secured to the side wall.
Claim 3
Dependent Claim
135 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower limit levels, a cover for said reservoir in a form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and heating means located between the side wall of the reservoir and said cover member in the area between the line at which the cover member is secured to said side wall and the normal upper limit level of the liquid in the reservoir.
Claim 4
Dependent Claim
135 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower limit levels, a cover for said reservoir in a form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and heating means located between the side wall of the reservoir and said cover member in the area between the line at which the cover member is secured to said side wall and the normal upper limit level of the liquid in the reservoir.
Claim 5
Dependent Claim
118 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower levels, a cover for said reservoir in the form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and a liner extending throughout the side wall and bottom of the reservoir and the marginal edges of said cover being in liquid sealing contact with said liner.
Claim 6
Dependent Claim
118 words
A reservoir having a side wall and adapted to receive and hold a variable amount of liquid therein with the surface of the liquid normally being located between upper and lower levels, a cover for said reservoir in the form of a flexible sheet of material normally contacting the surface of said liquid throughout the major area of said surface, the marginal edges of said sheet material being secured to the side wall of said reservoir along a line located between said upper and lower limit levels of the liquid; and a liner extending throughout the side wall and bottom of the reservoir and the marginal edges of said cover being in liquid sealing contact with said liner.
Claim 7
Dependent Claim
23 words
A reservoir as defined in claim 3, wherein; both said cover and said liner are formed of a water impervious flexible sheet material.
References Cited (Backward Citations)
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Cited
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |