Patent US4227679A successfully refreshed from Google Patents.
Patent US2698031A successfully refreshed from Google Patents.
US2698031A
Expired / Lapsed
US
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Progressive lock seam for sheet metal pipes
Assignee: Individual
•
Filing: 1953-02-24
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Granted: 1954-12-28
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Expires: 1973-02-24
Abstract
No abstract record available.
Inventors
- 👤 Primich Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:50
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1534990A
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US1673642A
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US1827722A
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US1900750A
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US1900749A
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US1907536A
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US2038389A
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US1297591A
Cited
US2259382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |