USRE32040E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculator apparatus with electronically alterable key symbols
Assignee: HP Inc
•
Filing: 1980-02-25
•
Granted: 1985-11-26
•
Expires: 2000-02-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:56
CPC Classifications
H; H03; H03M; H03M11/00; H03M11/02; H03M11/04; H03M11/14; H03M11/18; G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0238; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H2209/00; H01H2209/024; H01H2209/038; H01H2209/068; H01H2209/082; H01H2215/00; H01H2219/00; H01H2219/002; H01H2219/01; H01H2219/012; H01H2219/014; H01H2219/016
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |