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Patent US2187254A successfully refreshed from Google Patents.
US2187254A
Expired / Lapsed
US
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Continuous vulcanizer
Assignee: RICHARD H CROOK
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Filing: 1937-09-03
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Granted: 1940-01-16
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Expires: 1957-09-03
Abstract
No abstract record available.
Inventors
- 👤 Archibald L Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:40
CPC Classifications
B; B29; B29D; B29D29/00; B29D29/06; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B30B7/00; B30B7/04; B29K; B29K2021/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-01-15 | 1943-07-17 | 1944-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-15 | 1947-07-17 | 1948-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-15 | 1951-07-17 | 1952-01-16 | $7700.00 | Window Closed / Lapsed |