US2428443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning highly polished glass sur
Assignee: —
•
Filing: —
•
Granted: 1947-10-07
•
Expires: 1964-10-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:58
CPC Classifications
B; B08; B08B; B08B1/00; B08B1/30; B08B1/32; B08B1/34; B08B1/10; B08B1/14; B08B1/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314116A
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US1886824A
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US2053766A
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US2046615A
Cited
US2142717A
Cited
US2142721A
Cited
US2142716A
Cited
US2150569A
Cited
US2193894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |