Patent US3577226A successfully refreshed from Google Patents.
US3577226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal bodies of uniform porosity
Assignee: Union Carbide Corp
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Filing: 1969-02-10
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Granted: 1971-05-04
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Expires: 1989-02-10
Abstract
Abstract SINTERED POROUS METAL SHEET, HAVING NOT MORE THAN ABOUT ONE PORE PER TWENTY-FIVE (25) SQUARE FEET OF SHEET WITH A SIZE LARGER THAN THREE TIMES THE AVERAGE PORE SIZE OF SAID SHEET.
Inventors
- 👤 Raymond J Elbert
- 👤 Ernest G Farrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:19
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/002; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F5/00; B22F5/006; F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; B22F2998/00; F28F2255/00; F28F2255/18; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |