Patent US3031944A successfully refreshed from Google Patents.
US3031944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling air diffuser
Assignee: THERMOTANK Inc
•
Filing: 1959-03-18
•
Granted: 1962-05-01
•
Expires: 1979-03-18
Abstract
No abstract record available.
Inventors
- 👤 Davidson Charles Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:29
CPC Classifications
F; F24; F24D; F24D5/00; E; E04; E04B; E04B9/00; E04B9/02; E04B9/30; 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)
US781538A
Cited
US2080960A
Cited
US2730942A
Cited
FR1106998A
Cited
US2833199A
Cited
US2902918A
Cited
US2920357A
Cited
US2956150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |