US3091220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquarium assembly
Assignee: Individual
•
Filing: 1959-08-10
•
Granted: 1963-05-28
•
Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 Allan H Willinger
- 👤 Harding W Willinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:40
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
AN AQUARIUM TANK COMPRISING A BODY COMPOSED OF TRANSPARENT PLASTIC MATERIAL HAVING A BOTTOM AND SIDE WALLS, SAID SIDE WALLS BEING FORMED WITH AN INWARDLY DIRECTED CURVATURE FORMING CONCAVE OUTER WALLS WHEREBY WHEN SAID TANK IS FILLED WITH LIQUID, THE LATERAL PRESSURE UPON SAID SIDE WALLS CAUSES THEM TO ASSUME PLANAR POSITIONS TO PREVENT OPTICAL DISTORTION CAUSED BY WALL CURVATURE.
Claim 2
Dependent Claim
60 words
AN AQUARIUM TANK COMPRISING A BODY COMPOSED OF TRANSPARENT PLASTIC MATERIAL HAVING A BOTTOM AND SIDE WALLS, SAID SIDE WALLS BEING FORMED WITH AN INWARDLY DIRECTED CURVATURE FORMING CONCAVE OUTER WALLS WHEREBY WHEN SAID TANK IS FILLED WITH LIQUID, THE LATERAL PRESSURE UPON SAID SIDE WALLS CAUSES THEM TO ASSUME PLANAR POSITIONS TO PREVENT OPTICAL DISTORTION CAUSED BY WALL CURVATURE.
References Cited (Backward Citations)
US388024A
Cited
US2780259A
Cited
US1263391A
Cited
US2002380A
Cited
US2503945A
Cited
US2776642A
Cited
US2859786A
Cited
US2905351A
Cited
US2936926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |