Patent US694220A successfully refreshed from Google Patents.
US694220A
Expired / Lapsed
US
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Former for filaments for incandescent electric lamps.
Assignee: Individual
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Filing: 1901-12-30
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Granted: 1902-02-25
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Expires: 1921-12-30
Abstract
No abstract record available.
Inventors
- 👤 Glenn Cannon Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:40
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0431; H10P72/0434; C; C30; C30B; C30B31/00; C30B31/06; C30B31/14
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) | 1905-02-24 | 1905-08-26 | 1906-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-02-24 | 1909-08-26 | 1910-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-02-24 | 1913-08-26 | 1914-02-25 | $7700.00 | Window Closed / Lapsed |