US2835309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanders for joining tubular members
Assignee: WALTER O BEYER
•
Filing: 1954-10-11
•
Granted: 1958-05-20
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; F; F16; F16L; F16L37/00; F16L37/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US500215A
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GB189424456A
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US1063258A
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GB191028349A
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US1433028A
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US1938194A
Cited
US1951833A
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US1970061A
Cited
US2383214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |