Patent US2783894A successfully refreshed from Google Patents.
US2783894A
Expired / Lapsed
US
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Microporous nylon film
Assignee: EMD Millipore Corp
•
Filing: 1955-03-24
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Granted: 1957-03-05
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Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Lovell
- 👤 John H Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:33
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/56; B01D67/00; B01D67/0002; B01D67/0009; B01D67/0011; B01D2323/00; B01D2323/12; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2562373A
Cited
US2631334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |