US2850676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated filament supply
Assignee: HP Inc
•
Filing: 1954-11-05
•
Granted: 1958-09-02
•
Expires: 1974-11-05
Abstract
No abstract record available.
Inventors
- 👤 George S Kan
- 👤 Bernard M Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/135; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2128117A
Cited
US2130441A
Cited
US2140707A
Cited
US2149090A
Cited
US2262044A
Cited
US2302900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |