Patent US1928443A successfully refreshed from Google Patents.
US1928443A
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Steam platen and method of making same
Assignee: BALDWIN SOUTHWARK CORP
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Filing: 1929-10-12
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Granted: 1933-09-26
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Expires: 1949-10-12
Abstract
No abstract record available.
Inventors
- 👤 Horace G Archer
- 👤 Clarence G Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:36
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21K; B21K25/00; Y; Y10; Y10S; Y10S292/00; Y10S292/50; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49934
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) | 1936-09-25 | 1937-03-27 | 1937-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-09-25 | 1941-03-27 | 1941-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-09-25 | 1945-03-27 | 1945-09-26 | $7700.00 | Window Closed / Lapsed |