US3251102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for casting piano plate
Assignee: WICKHAM PIANO PLATE CO
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Filing: 1961-01-16
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Granted: 1966-05-17
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Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Henry G Wickham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:05
CPC Classifications
B; B22; B22C; B22C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF FABRICATING A PIANO PLATE WITH INTEGRAL HITCH PINS, INCLUDING THE STEPS OF FORMING A SAND MOLD OF PIANO PLATE CONFIGURATION, SAID MOLD HAVING A CAVITY WITH A PRINCIPAL PLANE TO FORM A HITCH PIN MOUNTING PORTION OF THE PLATE, SEATING IN SAID CAVITY A GUIDE PLATE HAVING A CONFIGURATION TO NEST THEREIN, SAID PLATE HAVING APERTURES THERETHROUGH DISPOSED AT AN ACUTE ANGLE TO THE SAID PRINCIPAL PLANE OF SAID CAVITY, PLACING ON SAID PLATE A GAUGE MEMBER HAVING ROD-LIKE PROJECTIONS FROM THE BOTTOM THEREOF AT ANGLES CORRESPONDING TO THE ANGLE OF SAID APERTURES, THEREBY INSERTING SAID PROJECTIONS THROUGH SAID APERTURES TO FORM DEPRESSIONS OF CORRESPONDING ANGULARITY IN SAID MOLD, AND UTILIZING THE SAND MOLD SO FORMED TO CAST A PIANO PLATE IN A CONVENTIONAL MANNER, SAID DEPRESSIONS PRODUCING A HITCH PIN MOUNTING PORTION WITH INTEGRAL HITCH PINS.
Claim 2
Independent Claim
140 words
A METHOD OF FABRICATING A PIANO PLATE WITH INTEGRAL HITCH PINS, INCLUDING THE STEPS OF FORMING A SAND MOLD OF PIANO PLATE CONFIGURATION, SAID MOLD HAVING A CAVITY WITH A PRINCIPAL PLANE TO FORM A HITCH PIN MOUNTING PORTION OF THE PLATE, SEATING IN SAID CAVITY A GUIDE PLATE HAVING A CONFIGURATION TO NEST THEREIN, SAID PLATE HAVING APERTURES THERETHROUGH DISPOSED AT AN ACUTE ANGLE TO THE SAID PRINCIPAL PLANE OF SAID CAVITY, PLACING ON SAID PLATE A GAUGE MEMBER HAVING ROD-LIKE PROJECTIONS FROM THE BOTTOM THEREOF AT ANGLES CORRESPONDING TO THE ANGLE OF SAID APERTURES, THEREBY INSERTING SAID PROJECTIONS THROUGH SAID APERTURES TO FORM DEPRESSIONS OF CORRESPONDING ANGULARITY IN SAID MOLD, AND UTILIZING THE SAND MOLD SO FORMED TO CAST A PIANO PLATE IN A CONVENTIONAL MANNER, SAID DEPRESSIONS PRODUCING A HITCH PIN MOUNTING PORTION WITH INTEGRAL HITCH PINS.
References Cited (Backward Citations)
US569691A
Cited
US591151A
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GB189418972A
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US726492A
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US801594A
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US978452A
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US1408877A
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US2155800A
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US2217021A
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US2283749A
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US2284729A
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US2532070A
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US2680276A
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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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |