US2848016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation ventilator tube
Assignee: Federal Paper Board Co Inc
•
Filing: 1955-01-17
•
Granted: 1958-08-19
•
Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Murphy
- 👤 Kenneth A Weimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/17; F; F16; F16L; F16L59/00; F16L59/14; F16L9/00; F16L9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US470514A
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US1158871A
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US1493447A
Cited
US2192914A
Cited
US2259737A
Cited
US2378272A
Cited
US2772609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |