Patent US2415328A successfully refreshed from Google Patents.
US2415328A
Expired / Lapsed
US
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Acetylene generation
Assignee: Shawinigan Chemicals Ltd
•
Filing: 1945-04-14
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Granted: 1947-02-04
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Expires: 1965-04-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Andersen
- 👤 Andrew C Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:01
CPC Classifications
C; C10; C10H; C10H13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1947120A
Cited
US2278521A
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US2233108A
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US2263658A
Cited
US2343185A
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US2357186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |