US2977457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding nozzles
Assignee: National Research Development Corp UK
•
Filing: 1958-07-23
•
Granted: 1961-03-28
•
Expires: 1978-07-23
Abstract
No abstract record available.
Inventors
- 👤 Houldcroft Peter Thomas
- 👤 Smith Arthur Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:39
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291; B23K9/295; B23K9/32; B23K9/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309696A
Cited
FR863983A
Cited
US2590084A
Cited
US2522482A
Cited
US2819383A
Cited
US2686860A
Cited
US2918563A
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 |