Patent US2736173A successfully refreshed from Google Patents.
US2736173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
duncan
Assignee: —
•
Filing: —
•
Granted: 1956-02-28
•
Expires: 1973-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:59
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25D21/008; F25B; F25B2700/00; F25B2700/21; F25B2700/2117; F25D2700/00; F25D2700/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1913433A
Cited
US2064396A
Cited
US2124375A
Cited
US2324309A
Cited
US2382733A
Cited
US2463027A
Cited
US2459083A
Cited
US2612026A
Cited
US2595967A
Cited
US2601466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |