US2851596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic counter
Assignee: HP Inc
•
Filing: 1954-04-15
•
Granted: 1958-09-09
•
Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:28
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82; C; C07; C07C; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2680241A
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US2743419A
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US2580771A
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US2665411A
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US2767582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |