US3105520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducts
Assignee: Richardsons Westgarth and Co Ltd
•
Filing: 1960-04-08
•
Granted: 1963-10-01
•
Expires: 1980-04-08
Abstract
No abstract record available.
Inventors
- 👤 Lorett Jezy Andre
- 👤 Mcgowan Michael Thom Alphonsus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:47
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; F15D1/04; B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/272; Y10T137/2733; Y10T137/274; Y10T29/00; Y10T29/49; Y10T29/49428
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US411864A
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USRE25153E
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US783586A
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US1118955A
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DE631762C
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US1996596A
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US2183174A
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US2297979A
Cited
US2662553A
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US2837810A
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US2884956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |