Patent US2768846A successfully refreshed from Google Patents.
US2768846A
Expired / Lapsed
US
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Conically tapered dual seal ring pipe connection
Assignee: Individual
•
Filing: 1953-03-02
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Granted: 1956-10-30
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Gratzmuller Jean Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:59
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L19/10; F16L19/12; Y; Y10; Y10S; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR367186A
Cited
US1687445A
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US1665346A
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US1779220A
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GB342539A
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US1851143A
Cited
US1936815A
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US2330841A
Cited
GB571450A
Cited
US2412664A
Cited
US2443187A
Cited
US2508763A
Cited
US2687315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |