US2913989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing devices for pumps
Assignee: Worthington Corp
•
Filing: 1957-03-15
•
Granted: 1959-11-24
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Thaddeus J Boardman
- 👤 John G Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/106; F04D29/108; Y; Y10; Y10S; Y10S277/00; Y10S277/926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1736002A
Cited
US2075895A
Cited
CH197944A
Cited
US2427656A
Cited
US2423825A
Cited
US2452261A
Cited
US2777395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |