US3093359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopcock for laboratory glassware and the like
Assignee: Ace Glass Inc
•
Filing: 1959-08-31
•
Granted: 1963-06-11
•
Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Woody Charles M De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:54
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A STOPCOCK FOR LABORATORY GLASSWARE AND THE LIKE HAVING A LOW COEFFICIENT OF LINEAR EXPANSION, COMPRISING A SMOOTH TAPERED GLASS VALVE BARREL, A COMPLEMENTARY, TAPERED GLASS VALVE PLUG AND A RELATIVELY THIN, FILM-LIKE COATING OF CHEMICALLY INERT, SELF-LUBRICATING THERMOPLASTIC MATERIAL UNIFORMLY COVERING THE TAPERED PERIPHERY OF SAID GLASS PLUG, PROVIDING A PLASTIC-TO-GLASS SEALING CONTACT WITH SAID BARREL, SAID COATED PLUG HAVING AN AVERAGE
Claim 2
Dependent Claim
63 words
A STOPCOCK FOR LABORATORY GLASSWARE AND THE LIKE HAVING A LOW COEFFICIENT OF LINEAR EXPANSION, COMPRISING A SMOOTH TAPERED GLASS VALVE BARREL, A COMPLEMENTARY, TAPERED GLASS VALVE PLUG AND A RELATIVELY THIN, FILM-LIKE COATING OF CHEMICALLY INERT, SELF-LUBRICATING THERMOPLASTIC MATERIAL UNIFORMLY COVERING THE TAPERED PERIPHERY OF SAID GLASS PLUG, PROVIDING A PLASTIC-TO-GLASS SEALING CONTACT WITH SAID BARREL, SAID COATED PLUG HAVING AN AVERAGE
References Cited (Backward Citations)
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |