US3426496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspended ventilating ceiling and ventilating runner therefor
Assignee: Conwed Corp
•
Filing: 1965-06-09
•
Granted: 1969-02-11
•
Expires: 1985-06-09
Abstract
No abstract record available.
Inventors
- 👤 W Bartlett Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/02; E04B9/06; E04B9/12; E04B9/122; F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
BE569341A
Cited
US2288104A
Cited
US2734126A
Cited
US2920357A
Cited
US3093221A
Cited
US3094285A
Cited
US3175655A
Cited
US3193063A
Cited
US3207057A
Cited
US3190208A
Cited
US3354598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |