Patent US400515A successfully refreshed from Google Patents.
US3553067A
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Laminated sheet for evaluating diffusive reactions
Assignee: EMD Millipore Corp
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Filing: 1968-03-25
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Granted: 1971-01-05
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Expires: 1988-03-25
Abstract
Abstract A LAMINATED SHEET CONSISTING OF A BASE SHEET OF STIFF BUT FLEXIBLE PLASTIC, A POROUS PLASTIC MEMBRANE SHEET WHICH HAS A MULTIPLICITY OF MICRO-PORES BONDED TO THE BASE SHEET, AND A THIN IMPREABLE PLASTIC SHEET SIMILARLY BONDED TO THE OTHER SIDE OF THE POROUS PLASTIC SHEET.
Inventors
- 👤 James L Dwyer
- 👤 Richard A Paine
- 👤 Charles W Souza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44747; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24322; Y10T428/24331; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/24998; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |