Patent US3196871A successfully refreshed from Google Patents.
US3196871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion type protective enclosure
Assignee: Individual
•
Filing: 1958-02-04
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Granted: 1965-07-27
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Hormats Saul
- 👤 Sovinsky Eugene
- 👤 Ella B Dwaayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
A; A62; A62B; A62B31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROTECTIVE ENCLOSURE COMPRISING A WALL COMPLETELY ENVELOPING SAID ENCLOSURE, A PORTION OF SAID WALL BEING A SHEET OF POROUS FIBROUS MATERIAL IMPREGNATED WITH ACTIVATED CHARCOAL, SAID CHARCOAL CONSTITUTING AT LEAST 15 PERCENT BY WEIGHT OF SAID MATERIAL, SAID MATERIAL HAVING A CARBON DIOXIDE DIFFUSIVITY FALLING IN THE RANGE 1.5X10-2 TO 7.0X10-2, SQ. CM./SEC., AND A THICKNESS OF AT LEAST ABOUT 2.5 MM., THE AREA OF SAID MATERIAL BEING SUFFICIENTLY GREAT TO DISPSEL SUBSTANTIALLY SOLEY BY DIFFUSION THE CARGON DIOXIDE PRODUCED BY ANY MAMMALS THAT AMY OCCUPY SAID ENCLOSURE, THE REMAINDER OF SAID WALL BEING IMPERVIOUS TO GAS.
Claim 2
Dependent Claim
98 words
A PROTECTIVE ENCLOSURE COMPRISING A WALL COMPLETELY ENVELOPING SAID ENCLOSURE, A PORTION OF SAID WALL BEING A SHEET OF POROUS FIBROUS MATERIAL IMPREGNATED WITH ACTIVATED CHARCOAL, SAID CHARCOAL CONSTITUTING AT LEAST 15 PERCENT BY WEIGHT OF SAID MATERIAL, SAID MATERIAL HAVING A CARBON DIOXIDE DIFFUSIVITY FALLING IN THE RANGE 1.5X10-2 TO 7.0X10-2, SQ. CM./SEC., AND A THICKNESS OF AT LEAST ABOUT 2.5 MM., THE AREA OF SAID MATERIAL BEING SUFFICIENTLY GREAT TO DISPSEL SUBSTANTIALLY SOLEY BY DIFFUSION THE CARGON DIOXIDE PRODUCED BY ANY MAMMALS THAT AMY OCCUPY SAID ENCLOSURE, THE REMAINDER OF SAID WALL BEING IMPERVIOUS TO GAS.
References Cited (Backward Citations)
US693638A
Cited
US1818155A
Cited
US1812380A
Cited
FR806776A
Cited
US2705489A
Cited
US2771021A
Cited
US3015367A
Cited
US3034947A
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |