US3328869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a speaker grill
Assignee: Paragon Die Casting Co
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Filing: 1965-04-08
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Granted: 1967-07-04
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Expires: 1985-04-08
Abstract
No abstract record available.
Inventors
- 👤 Melvin R Lannert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/023; B; B29; B29C; B29C45/00; B29C45/0053; B29C45/0055; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/4962; Y10T29/49789; Y10T29/4979; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A METHOD OF FORMING A ONE-PIECE SPEAKER GRILL, THE STEPS COMPRISING CASTING AN INTEGRAL METAL PLATE HAVING A PLURALITY OF RECESSES SEPARATED BY ELONGATED AND SUBSTANTIALLY PARALLEL PARTITIONS, EACH RECESS EXTENDING REARWARDLY INTO THE PLATE FROM THE FRONT SURFACE THEREOF AND HAVING A REARWARD EXTENT AT LEAST AS GREAT AS THE REARWARD EXTENT OF THE PARTITIONS BORDERING THE SAME, EACH RECESS BEING CLOSED AT ITS REAR END BY A WEB INTEGRAL WITH THE BORDERING PARTITIONS AND MERGING WITH ONE OF SUCH PARTITIONS ALONG A PERDETERMINED LINE OF WEAKNESS CAPABLE OF FRACTURING UPON THE APPLICATION OF REARWARD FORCE EXERTED UPON SAID WEB, AND THEREAFTER FORCING SAID WEB REARWARDLY TO CAUSE FRACTURE ALONG SAID LINE OF WEAKNESS AND TO BEND THE WEB REARWARDLY TO PROVIDE AN OPENING THROUGH SAID PLATE.
Claim 2
Dependent Claim
129 words
IN A METHOD OF FORMING A ONE-PIECE SPEAKER GRILL, THE STEPS COMPRISING CASTING AN INTEGRAL METAL PLATE HAVING A PLURALITY OF RECESSES SEPARATED BY ELONGATED AND SUBSTANTIALLY PARALLEL PARTITIONS, EACH RECESS EXTENDING REARWARDLY INTO THE PLATE FROM THE FRONT SURFACE THEREOF AND HAVING A REARWARD EXTENT AT LEAST AS GREAT AS THE REARWARD EXTENT OF THE PARTITIONS BORDERING THE SAME, EACH RECESS BEING CLOSED AT ITS REAR END BY A WEB INTEGRAL WITH THE BORDERING PARTITIONS AND MERGING WITH ONE OF SUCH PARTITIONS ALONG A PERDETERMINED LINE OF WEAKNESS CAPABLE OF FRACTURING UPON THE APPLICATION OF REARWARD FORCE EXERTED UPON SAID WEB, AND THEREAFTER FORCING SAID WEB REARWARDLY TO CAUSE FRACTURE ALONG SAID LINE OF WEAKNESS AND TO BEND THE WEB REARWARDLY TO PROVIDE AN OPENING THROUGH SAID PLATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |