Patent US3467411A successfully refreshed from Google Patents.
US3467411A
Expired / Lapsed
US
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Threaded sheet metal fitting
Assignee: CHRISTIAN P KLAPPROTH JR
•
Filing: 1966-12-19
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Granted: 1969-09-16
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Christian P Klapproth Jr
- 👤 Melvin R Doxzon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/08; F16L41/10; F24; F24F; F24F13/00; F24F13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US455502A
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US1763755A
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US2392220A
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NL69154C
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US2907592A
Cited
AT214727B
Cited
US3109670A
Cited
US3152817A
Cited
US3306638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |