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US2428944A
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Procedure and apparatus for use in vulcanizing hollow shaped articles
Assignee: Seiberling Rubber Co
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Filing: 1942-07-15
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Granted: 1947-10-14
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Expires: 1962-07-15
Abstract
No abstract record available.
Inventors
- 👤 Harry P Schrank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:04
CPC Classifications
B; B29; B29D; B29D22/00; B29C; B29C35/00; B29C35/02; B29C35/0227; B29K; B29K2021/00
Claims Analysis
Total Claims: 0
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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) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |