US3403615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louvre plate for use in a forced air heating system
Assignee: GRILLE CO Ltd
•
Filing: 1966-11-18
•
Granted: 1968-10-01
•
Expires: 1986-11-18
Abstract
No abstract record available.
Inventors
- 👤 Lloyd G Dayus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/08; F24F13/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348360A
Cited
US1400860A
Cited
US1673906A
Cited
US2282946A
Cited
US2652133A
Cited
US3191242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |