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Patent US1609129A successfully refreshed from Google Patents.
US1609129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfurnace
Assignee: Carnegie Institution for Science
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Filing: 1925-05-15
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Granted: 1926-11-30
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Expires: 1945-05-15
Abstract
No abstract record available.
Inventors
- 👤 Howard S Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/30
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) | 1929-11-29 | 1930-05-31 | 1930-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-29 | 1934-05-31 | 1934-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-29 | 1938-05-31 | 1938-11-30 | $7700.00 | Window Closed / Lapsed |