US3436930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for multiple room air conditioning
Assignee: RUSSELL T SMITH
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Filing: 1967-09-05
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Granted: 1969-04-08
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Russell T Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F1/00; F24F1/02; F24F1/022; F24F1/027; F24F5/00; F24F5/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |