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Patent US642298A successfully refreshed from Google Patents.
US642298A
Expired / Lapsed
US
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Acetylene-generator.
Assignee: JOSEPH W BORST
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Filing: 1899-05-15
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Granted: 1900-01-30
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Expires: 1919-05-15
Abstract
No abstract record available.
Inventors
- 👤 Hippolyte M Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
C; C10; C10H; C10H15/00; C10H15/22; C08; C08J; C08J7/00; C08J7/04; C08J7/0427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1903-01-30 | 1903-08-01 | 1904-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-01-30 | 1907-08-01 | 1908-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-01-30 | 1911-08-01 | 1912-01-31 | $7700.00 | Window Closed / Lapsed |