Patent US2389355A successfully refreshed from Google Patents.
Patent US2167724A successfully refreshed from Google Patents.
US2167724A
Expired / Lapsed
US
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Process for production of hollow articles
Assignee: Dunlop Rubber Co Ltd
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Filing: 1936-06-03
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Granted: 1939-08-01
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Expires: 1956-06-03
Abstract
No abstract record available.
Inventors
- 👤 Murphy Edward Arthur
- 👤 Geoffrey W Trobridge
- 👤 Joseph A Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:19
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/14; 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) | 1942-07-31 | 1943-01-30 | 1943-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-31 | 1947-01-30 | 1947-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-31 | 1951-01-30 | 1951-08-01 | $7700.00 | Window Closed / Lapsed |