US2849895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure plugs
Assignee: Individual
•
Filing: 1956-04-10
•
Granted: 1958-09-02
•
Expires: 1976-04-10
Abstract
No abstract record available.
Inventors
- 👤 Hawkins Wallace Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:12
CPC Classifications
B; B60; B60S; B60S5/00; Y; Y10; Y10S; Y10S16/00; Y10S16/02; Y10S220/00; Y10S220/19; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1814141A
Cited
US2526225A
Cited
US2649090A
Cited
US2723041A
Cited
FR1084654A
Cited
FR1093604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |