US4542441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card guide
Assignee: RTX Corp
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Filing: 1985-02-25
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Granted: 1985-09-17
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Expires: 2005-02-25
Abstract
Abstract Edge notches of various depths in circuit boards correspond with slots of various depths in a card guide so that the boards are not interchangeable.
Inventors
- 👤 Frederick A. Perretta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:06
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/14; H05K7/1438; H05K7/1452; H05K7/1455; H05K1/00; H05K1/02; H05K1/14; H05K2203/00; H05K2203/16; H05K2203/168; H05K3/00; H05K3/30; H05K3/301
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A ramped card guide for providing fully mutually exclusive insertion of multiple printed circuit boards into the guide, comprising: one side having a plurality of slots of progressively varying depth, each slot for receiving one side edge of a circuit board; another side having a plurality of slots of reciprocally progressively varying depth, as contrasted with the one side, each slot for receiving the other side edge of the circuit board; wherein each circuit board has a unique combination of edge notches of depth corresponding to the respective depths of the slots into which the board is intended to be inserted so that full insertion of all boards is indicated by trailing edge correspondence.
Claim 2
Dependent Claim
114 words
A ramped card guide for providing fully mutually exclusive insertion of multiple printed circuit boards into the guide, comprising: one side having a plurality of slots of progressively varying depth, each slot for receiving one side edge of a circuit board; another side having a plurality of slots of reciprocally progressively varying depth, as contrasted with the one side, each slot for receiving the other side edge of the circuit board; wherein each circuit board has a unique combination of edge notches of depth corresponding to the respective depths of the slots into which the board is intended to be inserted so that full insertion of all boards is indicated by trailing edge correspondence.
References Cited (Backward Citations)
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US3246279A
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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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |