US2416695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for impregnating filter material
Assignee: Individual
•
Filing: 1936-01-06
•
Granted: 1947-03-04
•
Expires: 1956-01-06
Abstract
No abstract record available.
Inventors
- 👤 Stuart M Jessop
- 👤 Harry E Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:46
CPC Classifications
B; B01; B01D; B01D39/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358647A
Cited
US420354A
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US1612310A
Cited
US1798164A
Cited
US1818155A
Cited
US2053781A
Cited
US1955552A
Cited
US2123604A
Cited
US2288072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |