Patent US2969812A successfully refreshed from Google Patents.
US2969812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe structure
Assignee: Individual
•
Filing: 1956-02-29
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Granted: 1961-01-31
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Ganahl Carl De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/805; F; F16; F16L; F16L9/00; F16L9/16; Y; Y10; Y10S; Y10S138/00; Y10S138/02; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1242903A
Cited
US2027961A
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US2467999A
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GB588858A
Cited
US2612910A
Cited
US2690769A
Cited
US2664373A
Cited
US2749643A
Cited
FR1077197A
Cited
US2782806A
Cited
US2815043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |