Patent US874938A successfully refreshed from Google Patents.
US874938A
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US
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Machine and apparatus for manufacturing filaments for electric incandescent lamps.
Assignee: Individual
•
Filing: 1903-08-27
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Granted: 1907-12-31
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Expires: 1923-08-27
Abstract
No abstract record available.
Inventors
- 👤 Francis M F Cazin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:18
CPC Classifications
A; A21; A21C; A21C3/00; A21C3/06; A21C3/065; B; B29; B29C; B29C31/00; B29C31/04; B29C31/042; B29C31/047
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) | 1910-12-30 | 1911-07-01 | 1911-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-12-30 | 1915-07-01 | 1915-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-12-30 | 1919-07-01 | 1919-12-31 | $7700.00 | Window Closed / Lapsed |