US2628851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible ventilated coupling
Assignee: Marmac Products Inc
•
Filing: 1950-10-17
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Granted: 1953-02-17
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Expires: 1970-10-17
Abstract
No abstract record available.
Inventors
- 👤 Richard O Jessup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/113; F16L27/1133; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1441; Y10T24/1451; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212; Y10T292/214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |