US2448595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heater having reverted expanding combustion chamber
Assignee: Individual
•
Filing: 1944-09-16
•
Granted: 1948-09-07
•
Expires: 1964-09-16
Abstract
No abstract record available.
Inventors
- 👤 Holbrook Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:10
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; B64; B64D; B64D13/00; B64D13/06; B64D13/08; B60H2001/2268; B60H2001/2271; Y; Y02; Y02T; Y02T50/00; Y02T50/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1670819A
Cited
US2097255A
Cited
US738619A
Cited
US1711365A
Cited
US1755727A
Cited
US1923614A
Cited
US2112391A
Cited
US2292339A
Cited
US2332094A
Cited
US2393167A
Cited
US2362571A
Cited
US2366416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |