US3381494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frost collector evaporator coil
Assignee: Doosan Bobcat North America Inc
•
Filing: 1966-10-27
•
Granted: 1968-05-07
•
Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Steelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:47
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0439; A47F3/0443; F; F25; F25D; F25D21/00; F25D21/06; F25D21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929229A
Cited
US3199581A
Cited
US3091942A
Cited
US3099914A
Cited
US3209553A
Cited
US3267692A
Cited
US3333437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |