US2688686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaporizer
Assignee: Hankscraft Co
•
Filing: 1951-11-05
•
Granted: 1954-09-07
•
Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Arne B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:35
CPC Classifications
F; F24; F24H; F24H1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1322860A
Cited
US1356846A
Cited
US1677299A
Cited
US754451A
Cited
US1326443A
Cited
US2049899A
Cited
US2301646A
Cited
US2387155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |