US2260534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator for corrugated structures
Assignee: PENNSYLVANIA WIRE GLASS Co
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Filing: 1939-12-18
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Granted: 1941-10-28
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Expires: 1959-12-18
Abstract
No abstract record available.
Inventors
- 👤 Paul G Masters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/40; F; F24; F24F; F24F7/00; E06B3/54; E06B3/58; E06B3/62; E06B2003/6297
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-10-27 | 1945-04-28 | 1945-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-27 | 1949-04-28 | 1949-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-27 | 1953-04-28 | 1953-10-28 | $7700.00 | Window Closed / Lapsed |