US2946450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1957-09-04
•
Granted: 1960-07-26
•
Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US817253A
Cited
US1095198A
Cited
US2168124A
Cited
US2345848A
Cited
US2559267A
Cited
US2751618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |