Patent US2050227A successfully refreshed from Google Patents.
US2050227A
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Apparatus for making hollow articles
Assignee: BRIDGEPORT THERMOSTAT Co
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Filing: 1930-02-03
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Granted: 1936-08-04
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Expires: 1950-02-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph G C Mantle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/10
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) | 1939-08-04 | 1940-02-03 | 1940-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-04 | 1944-02-03 | 1944-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-04 | 1948-02-03 | 1948-08-04 | $7700.00 | Window Closed / Lapsed |