US2976908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for manufacturing pipe bends
Assignee: Individual
•
Filing: 1957-05-14
•
Granted: 1961-03-28
•
Expires: 1977-05-14
Abstract
No abstract record available.
Inventors
- 👤 Ferguson James Mackay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:08
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353714A
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US1872384A
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US1943700A
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US1996838A
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DE570251C
Cited
US1956604A
Cited
US2105075A
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US2435904A
Cited
US2485534A
Cited
CH292863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |