US3514034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-fired and powered heating system
Assignee: Individual
•
Filing: 1968-03-20
•
Granted: 1970-05-26
•
Expires: 1988-03-20
Abstract
No abstract record available.
Inventors
- 👤 Walton W Cushman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F24D; F24D3/00; F24D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE237032C
Cited
US1576086A
Cited
US2241086A
Cited
US2707593A
Cited
US3078044A
Cited
US3307785A
Cited
US3372871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |