Patent US2952766A successfully refreshed from Google Patents.
US2952766A
Expired / Lapsed
US
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Blowpipe type sigma torch
Assignee: Union Carbide Corp
•
Filing: 1957-06-17
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Granted: 1960-09-13
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Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Craig
- 👤 Kenneth E Richter
- 👤 Thaddeus J Wojciak
- 👤 Meincke Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2606267A
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US2544711A
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FR1040756A
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US2683791A
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US2736787A
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US2761049A
Cited
US2767302A
Cited
US2768280A
Cited
US2797306A
Cited
US2817749A
Cited
US2881305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |