US2716428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak stopper for condenser tubes
Assignee: Individual
•
Filing: 1953-03-03
•
Granted: 1955-08-30
•
Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 Pennella Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:17
CPC Classifications
F; F28; F28F; F28F11/00; F28F11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US184790A
Cited
US768477A
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GB450984A
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US2225615A
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US2262042A
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US2310927A
Cited
US2500601A
Cited
US2445273A
Cited
US2449616A
Cited
US2484904A
Cited
US2620830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |