US2780206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple boiler control system
Assignee: Vapor Heating Corp
•
Filing: 1953-06-23
•
Granted: 1957-02-05
•
Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Rocque Joseph E La
- 👤 Charles E Impey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
F; F24; F24D; F24D12/00; F24D12/02; F22; F22B; F22B31/00; F22B31/04; F24D2200/00; F24D2200/04; F24D2200/043; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1544310A
Cited
US1743621A
Cited
US2201621A
Cited
US2073072A
Cited
US2080924A
Cited
US2362045A
Cited
US2403230A
Cited
US2470996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |