Patent US3578200A successfully refreshed from Google Patents.
US3578200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Port protectors
Assignee: GTI Corp
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Filing: 1969-11-03
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Granted: 1971-05-11
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Expires: 1989-11-03
Abstract
Abstract A port closure is provided for threaded ports comprising a resilient cylindrical member adapted to slidably fit within said port and having an interrupted thread on the exterior thereof intermediate the ends engaging the threads in said port, a circular end cap covering one end of said cylindrical member and extending beyond the periphery forming an annular radial flange, a depending ring at the outer periphery of the flange spaced from the cylinder and engaging the surface surrounding the port and spacing the flange therefrom when the cylinder is in place in said port whereby the cylinder is under axial tension between the thread and end cap.
Inventors
- 👤 Harry Hetzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:26
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/0005; B65D39/0023; B65D2539/00; B65D2539/001; B65D2539/003; Y; Y10; Y10S; Y10S411/00; Y10S411/91
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A closure for internally threaded ports comprising a resilient cylindrical member adapted to slidably fit within said port, an interrupted thread on the exterior of the cylindrical member engaging the threads in said port, a circular end cap closing one end of said cylindrical member and extending beyond the periphery thereof forming an annular flange, a depending ring at the outer periphery of said flange spaced from the cylinder member and engaging the surface surrounding the port and spacing the flange therefrom when the cylinder member is in place in said port whereby the cylinder member is in axial tension.
Claim 2
Dependent Claim
100 words
A closure for internally threaded ports comprising a resilient cylindrical member adapted to slidably fit within said port, an interrupted thread on the exterior of the cylindrical member engaging the threads in said port, a circular end cap closing one end of said cylindrical member and extending beyond the periphery thereof forming an annular flange, a depending ring at the outer periphery of said flange spaced from the cylinder member and engaging the surface surrounding the port and spacing the flange therefrom when the cylinder member is in place in said port whereby the cylinder member is in axial tension.
Claim 3
Dependent Claim
20 words
A closure as claimed in claim 1 wherein the center portion of said circular end cap is reduced in thickness.
Claim 4
Dependent Claim
10 words
A closure as claimed in claim 1 made of polyethylene.
Claim 5
Dependent Claim
15 words
A closure as claimed in claim 1 formed in one piece of a resilient plastic.
Claim 6
Dependent Claim
18 words
A closure as claimed in claim 1 wherein the interrupted thread comprises two thread segments substantially 180* apart.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |