US876332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making incandescent-lamp filaments.
Assignee: PARKER-CLARK ELECTRIC Co
•
Filing: 1907-01-14
•
Granted: 1908-01-14
•
Expires: 1927-01-14
Abstract
No abstract record available.
Inventors
- 👤 Walter G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:25
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C04; C04B; C04B35/00; C04B35/515; C04B35/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1911-01-13 | 1911-07-15 | 1912-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-01-13 | 1915-07-15 | 1916-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-01-13 | 1919-07-15 | 1920-01-14 | $7700.00 | Window Closed / Lapsed |