US2028095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heating device
Assignee: TULCRAN Inc
•
Filing: 1934-05-14
•
Granted: 1936-01-14
•
Expires: 1954-05-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Tully
- 👤 Robert B Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:43
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-01-13 | 1939-07-15 | 1940-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-13 | 1943-07-15 | 1944-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-13 | 1947-07-15 | 1948-01-14 | $7700.00 | Window Closed / Lapsed |