US3527918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube panel welding apparatus
Assignee: Foster Wheeler Inc
•
Filing: 1967-06-30
•
Granted: 1970-09-08
•
Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 John Bunnell Fielder
- 👤 Norman Dale Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:09
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/0026; B23K9/0052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA590037A
Cited
US1029389A
Cited
US1938819A
Cited
US2439740A
Cited
US2423190A
Cited
US2432495A
Cited
US3076889A
Cited
US3258577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |