US438998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of porous sheets or surfaces for the
Assignee: SABIC Global Technologies BV
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Filing: —
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Granted: 1890-10-21
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Expires: 1907-10-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:02
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3231; B01J20/3234; B01J20/324; B01J20/3202; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3291; B01J20/3295
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) | 1893-10-20 | 1894-04-21 | 1894-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-10-20 | 1898-04-21 | 1898-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-10-21 | 1902-04-22 | 1902-10-22 | $7700.00 | Window Closed / Lapsed |