US3645703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helium permeable containers
Assignee: Hittman Associates Inc
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Filing: 1966-07-28
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Granted: 1972-02-29
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Expires: 1986-07-28
Abstract
Abstract An alpha-emitting radioisotope source container which allows for the controlled release of helium gas without permitting any radioactive material to escape, the container being a metal-fiber composite of helium impermeable metallic wall means with helium permeable quartz fibers reinforcing the wall means and extending continuously through at least a portion of said wall means and providing a fibrous helim leak path.
Inventors
- 👤 Louis Frank
- 👤 Harry P Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/015; G21G; G21G4/00; G21G4/04; G21G4/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
43 words
The container of claim 1, wherein said metallic wall means are comprised of a member selected from the group consisting of molybdenum, tungsten, tantalum, columbium, titanium, nickel, cobalt, alloys based upon the foregoing metals, noble metals, and alloys based upon the noble metals.
Claim 2
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of molybdenum.
Claim 3
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of tungsten.
Claim 4
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of tantalum.
Claim 5
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of columbium.
Claim 6
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of titanium.
Claim 7
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of nickel.
Claim 8
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of cobalt.
Claim 9
Dependent Claim
16 words
The container of claim 2, wherein the metallic wall means are comprised of a noble metal.
Claim 10
Dependent Claim
14 words
The container of claim 10, wherein the metallic wall means are comprised of gold.
Claim 11
Dependent Claim
14 words
The container of claim 10, wherein the metallic wall means are comprised of silver.
Claim 12
Dependent Claim
14 words
The container of claim 10, wherein the metallic wall means are comprised of platinum.
Claim 13
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of platinum-rhodium.
Claim 14
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of platinum-iridium.
Claim 15
Dependent Claim
14 words
The container of claim 2, wherein the metallic wall means are comprised of platinum-osmium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |