Patent US3234741A successfully refreshed from Google Patents.
US3234741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layers or screens for preventing or minimising fluid flow through surfaces
Assignee: Individual
•
Filing: 1961-10-24
•
Granted: 1966-02-15
•
Expires: 1981-10-24
Abstract
No abstract record available.
Inventors
- 👤 Ionides Michael George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:38
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/041; E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN IMPERVIOUS MEMBRANCE FOR FORMING PART OF A LINING LAYER FOR A LIQUID RESERVOIR COMPRISING AN IMPERVIOUS FLEXIBLE SHEET MATERIAL TO ONE FACE OF WHICH ARE ATTACHED A SERIES OF PARALLEL LONGIUDINALLY EXTENDING OPEN-ENDED TUBES SEPARATED FROM ONE ANOTHER BY LONGITUDINALLY EXTENDING PARALLEL AREAS OF SAID SHEET MATERIAL, THE DIAMETER OF EACH OF THE LONGITUDINALLY EXTENDING TUBES WHEN FULLY INFLATED BEING GREATER THAN THE DISTANCE BETWEEN THE CENTERS OF THE POINTS OF ATTACHMENT OF THE TUBES TO THE SHEET MATERIAL, WHEREBY WHEN SAID TUBES ARE INFLATED SUBSTANTIAL AREAS OF ADJACENT TUBES WILL LIE IN CONTACT WITH EACH OTHER.
Claim 2
Dependent Claim
98 words
AN IMPERVIOUS MEMBRANCE FOR FORMING PART OF A LINING LAYER FOR A LIQUID RESERVOIR COMPRISING AN IMPERVIOUS FLEXIBLE SHEET MATERIAL TO ONE FACE OF WHICH ARE ATTACHED A SERIES OF PARALLEL LONGIUDINALLY EXTENDING OPEN-ENDED TUBES SEPARATED FROM ONE ANOTHER BY LONGITUDINALLY EXTENDING PARALLEL AREAS OF SAID SHEET MATERIAL, THE DIAMETER OF EACH OF THE LONGITUDINALLY EXTENDING TUBES WHEN FULLY INFLATED BEING GREATER THAN THE DISTANCE BETWEEN THE CENTERS OF THE POINTS OF ATTACHMENT OF THE TUBES TO THE SHEET MATERIAL, WHEREBY WHEN SAID TUBES ARE INFLATED SUBSTANTIAL AREAS OF ADJACENT TUBES WILL LIE IN CONTACT WITH EACH OTHER.
References Cited (Backward Citations)
BE560165A
Cited
NL69193C
Cited
NL87531C
Cited
US983209A
Cited
GB148767A
Cited
US2724418A
Cited
US2922344A
Cited
FR1209649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |