US4443336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Survival and water purification system
Assignee: Individual
•
Filing: 1982-10-04
•
Granted: 1984-04-17
•
Expires: 2002-10-04
Abstract
Abstract A water purifying system unit that is portable, fabricated of durable parts and makes provision for storage of basic survival needs in addition to water. A double chamber unit with bag and filter with separating filter and storage compartment provides three stage filtration of water. An appropriate mouthpiece makes drinking directly from the unit possible.
Inventors
- 👤 Mary L. Bennethum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:57
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/002; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A portable filter unit, comprising; an outer flexible container including a top; an upper compartment of flexible material enclosed in said container; a lower compartment of flexible material enclosed in said container; a tube communicating between said lower compartment and the upper end of said container and including an upper end and a lower end; a rigid filter means mounted in said container intermediate said compartment; and a filter means including a pair of separate filter units, one communicating between said upper and lower compartments and the other between the lower compartment and the lower end of said tube, respectively.
Claim 2
Dependent Claim
100 words
A portable filter unit, comprising; an outer flexible container including a top; an upper compartment of flexible material enclosed in said container; a lower compartment of flexible material enclosed in said container; a tube communicating between said lower compartment and the upper end of said container and including an upper end and a lower end; a rigid filter means mounted in said container intermediate said compartment; and a filter means including a pair of separate filter units, one communicating between said upper and lower compartments and the other between the lower compartment and the lower end of said tube, respectively.
Claim 3
Dependent Claim
26 words
The combination as set forth in claim 1 wherein a separate receptacle is included in said rigid filter means for receiving and holding a survival material.
Claim 4
Dependent Claim
25 words
The combination as set forth in claim 2 wherein said receptacle had mounted on it a slidable cover for closing it in a watertight condition.
Claim 5
Dependent Claim
23 words
The combination as set forth in claim 1 wherein said tube upper end is connected to a stopper fixed in said container top.
Claim 6
Dependent Claim
26 words
The combination as set forth in claim 1 wherein an open cup is mounted in said container top, said tube upper end terminating in said cup.
Claim 7
Dependent Claim
38 words
The combination as set forth in claim 1 including an open ended cup and wherein said tube terminates at its upper end at the bottom of said cup for providing potable water directly to the user for drinking.
Claim 8
Dependent Claim
40 words
The combination as set forth in claim 1 wherein a first one-way check valve is mounted in said filter means communicating between said upper and lower compartments for insuring flow of water therebetween responsive to compression of the upper compartment.
Claim 9
Dependent Claim
36 words
The combination as set forth in claim 1 wherein said upper compartment comprises a removable bag, said bag including an opening and an associated Velcro fastener at its upper end for receiving water to be filtered.
Claim 10
Dependent Claim
16 words
The combination as set forth in claim 2 wherein said survival material comprises a radio transmitter.
Claim 11
Dependent Claim
14 words
The combination as set forth in claim 2 wherein said survival material comprises matches.
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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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |