US3493716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal tube welding torch
Assignee: Foster Wheeler Inc
•
Filing: 1967-08-21
•
Granted: 1970-02-03
•
Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:08
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291; B23K9/296; B23K9/02; B23K9/028; B23K9/0288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2835783A
Cited
US2868953A
Cited
US3084243A
Cited
GB1045149A
Cited
US3324225A
Cited
US3350537A
Cited
GB1097614A
Cited
FR1483662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |