US3259148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galvanized steel tubing
Assignee: Allied Tube and Conduit Corp
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Filing: 1962-12-12
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Granted: 1966-07-05
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Expires: 1982-12-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore H Krengel
- 👤 Wilk Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; C; C23; C23C; C23C2/00; C23C2/003; C23C2/0035; C23C2/0038; C23C2/02; C23C2/022; C23C2/024; C23C2/34; C23C2/36; C23C2/38; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A HOLLOW STEEL TUBING HOT DIP GALVANIZED ON THE EXPOSED OUTER SURFACES OF THE TUBING WHILE THE INTERIOR SURFACES OF THE TUBING REMAIN FREE OF GALVANIZE, COMPRISING A STEEL BASE HAVING A BLUE OXIDE OF IRON ON THE INNER SURFACES AND THEREBY COMPLETELY FREE OF ZINC, AND THE OUTER SURFACES OF WHICH HAVE A GALVANIZE COATING CONSISTING SOLELY OF AN INNER PORTION OF AN ALLOY OF IRON AND ZINC AND AN OUTER PORTION CONSISTING OF ZINC WITH THE PORTIONS OF THE GALVANIZED COATING STRONGLY BONDED ONE OF THE OTHER END AND WITH THE INNER PORTION STRONGLY BONDED TO THE STEEL BASE.
Claim 2
Dependent Claim
101 words
A HOLLOW STEEL TUBING HOT DIP GALVANIZED ON THE EXPOSED OUTER SURFACES OF THE TUBING WHILE THE INTERIOR SURFACES OF THE TUBING REMAIN FREE OF GALVANIZE, COMPRISING A STEEL BASE HAVING A BLUE OXIDE OF IRON ON THE INNER SURFACES AND THEREBY COMPLETELY FREE OF ZINC, AND THE OUTER SURFACES OF WHICH HAVE A GALVANIZE COATING CONSISTING SOLELY OF AN INNER PORTION OF AN ALLOY OF IRON AND ZINC AND AN OUTER PORTION CONSISTING OF ZINC WITH THE PORTIONS OF THE GALVANIZED COATING STRONGLY BONDED ONE OF THE OTHER END AND WITH THE INNER PORTION STRONGLY BONDED TO THE STEEL BASE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |