US2186908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filtering stopper
Assignee: SmithKline Beecham Corp
•
Filing: 1939-02-01
•
Granted: 1940-01-09
•
Expires: 1959-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert C Page
- 👤 Paul E Tullar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:52
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/16; B65D51/1633; B65D51/1644; B65D51/165; A; A61; A61J; A61J1/00; A61J1/14; A61J1/1412; A61J1/1425; B65D51/002; A61J1/1443; A61J1/145; A61J1/1468; Y; Y10; Y10S; Y10S215/00; Y10S215/03
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) | 1943-01-08 | 1943-07-10 | 1944-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-08 | 1947-07-10 | 1948-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-08 | 1951-07-10 | 1952-01-09 | $7700.00 | Window Closed / Lapsed |