Patent US976207A successfully refreshed from Google Patents.
US976207A
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US
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Filament or resistor for heating units or lamps.
Assignee: PARKER-CLARK ELECTRIC Co
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Filing: 1909-05-20
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Granted: 1910-11-22
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Expires: 1929-05-20
Abstract
No abstract record available.
Inventors
- 👤 Herschel C Parker
- 👤 Walter G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933
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) | 1913-11-21 | 1914-05-23 | 1914-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-11-21 | 1918-05-23 | 1918-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-11-21 | 1922-05-23 | 1922-11-22 | $7700.00 | Window Closed / Lapsed |