US2861510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating apparatus
Assignee: Pyle National Co
•
Filing: 1956-07-05
•
Granted: 1958-11-25
•
Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 William A Wulle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US249103A
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US502269A
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US1499962A
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GB375862A
Cited
US2416964A
Cited
US2413402A
Cited
US2550810A
Cited
US2683408A
Cited
US2664550A
Cited
US2772624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |