Patent US2468760A successfully refreshed from Google Patents.
US2468760A
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Apparatus for producing hollow rubber articles
Assignee: Sun Rubber Co
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Filing: 1945-11-28
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Granted: 1949-05-03
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Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 David C Kempthorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/60; B29C49/20; B29D; B29D22/00; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2331630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |