Patent US2605731A successfully refreshed from Google Patents.
US2605731A
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Apparatus for forming sheet material under controled pressure
Assignee: Glenn L Martin Co
•
Filing: 1948-12-16
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Granted: 1952-08-05
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Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 Richard B Schulze
- 👤 Henry P Hessler
- 👤 Clarence M Davison
- 👤 Mahlon A Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:28
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7769; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |