US3504663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air flow control
Assignee: GlaxoSmithKline LLC
•
Filing: 1965-10-21
•
Granted: 1970-04-07
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 William C Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/0235
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3164141A
Cited
US3105477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |