US3397445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bimetal tubing
Assignee: Individual
•
Filing: 1965-09-30
•
Granted: 1968-08-20
•
Expires: 1985-09-30
Abstract
No abstract record available.
Inventors
- 👤 William L Ulmer
- 👤 Harry W Mcquaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B21; B21C; B21C1/00; B21C1/16; B21C1/22; B21C37/00; B21C37/06; B21C37/08; B21C37/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1193667A
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US930927A
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US1650321A
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US2775029A
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US2787827A
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US3091848A
Cited
US3025596A
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US3167857A
Cited
US3156042A
Cited
US3205573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |