US2851201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vent stopper
Assignee: Individual
•
Filing: 1955-02-01
•
Granted: 1958-09-09
•
Expires: 1975-02-01
Abstract
No abstract record available.
Inventors
- 👤 Edward J Poitras
- 👤 Carl W Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/14; A61J1/1475; A61J1/1406; A61J1/1412; A61J1/1425; B; B65; B65D; B65D51/00; B65D51/002; B65D51/16; B65D51/1633; B65D51/1644; Y; Y10; Y10S; Y10S215/00; Y10S215/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US599642A
Cited
US1009980A
Cited
US1326880A
Cited
US1241352A
Cited
US2058027A
Cited
US2114583A
Cited
US2263890A
Cited
US2507248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |