US3693455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample injection device
Assignee: Individual
•
Filing: 1970-08-25
•
Granted: 1972-09-26
•
Expires: 1990-08-25
Abstract
Abstract An injection port suitable for use with a hypodermic syringe in high pressure gas chromatography comprises 2 septa mounted in series in a housing. The septa are made of a material which can be penetrated by the needle of a syringe and each septa is backed by a disc of rigid material having a hole for the needle to pass through. Preferably the septa are made of silicone rubber and backed by a disc of stainless steel.
Inventors
- 👤 Albert Frederick Harding
- 👤 Brian Pearce
- 👤 William Llewelyn Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
An injection port suitable for use with a hypodermic syringe in a high pressure chromatographic system, which port comprises two or more septa mounted in series in a housing and made of a material capable of being penetrated by the needle of a hypodermic syringe, each of the septa being in contact with a disc of rigid material having a hole large enough to permit the passage of the needle of a syringe.
Claim 2
Dependent Claim
73 words
An injection port suitable for use with a hypodermic syringe in a high pressure chromatographic system, which port comprises two or more septa mounted in series in a housing and made of a material capable of being penetrated by the needle of a hypodermic syringe, each of the septa being in contact with a disc of rigid material having a hole large enough to permit the passage of the needle of a syringe.
Claim 3
Dependent Claim
16 words
An injection port as claimed in claim 1 wherein the septa are made of silicone rubber.
References Cited (Backward Citations)
US2839152A
Cited
US3137174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |