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US2984870A
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Method of forming a prestressed hollow article
Assignee: Studebaker Packard Corp
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Filing: 1957-10-09
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Granted: 1961-05-23
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Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 Elmer P Warnken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/44; B29C43/00; B29C43/02; B29C43/10; B29C43/12; Y; Y10; Y10S; Y10S138/00; Y10S138/02; Y10S264/00; Y10S264/53; Y10S273/00; Y10S273/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2414125A
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US2367779A
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US2531218A
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US2594838A
Cited
US2723426A
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US2784457A
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US2862541A
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US2779976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |