Patent US2842237A successfully refreshed from Google Patents.
US2842237A
Expired / Lapsed
US
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Method and means of improving the structural characteristics of sheet material
Assignee: Individual
•
Filing: 1955-06-06
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Granted: 1958-07-08
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Horst W A Paulssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:15
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/361; E04D3/363; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/322; E04D3/3607; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE496612A
Cited
FR743672A
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US1250551A
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US1727184A
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US1983612A
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US2105280A
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US2585760A
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US2488887A
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US2695445A
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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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |