US3490523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer device
Assignee: United States Department of Health and Human Services
•
Filing: 1968-04-08
•
Granted: 1970-01-20
•
Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 William G Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:31
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/065; B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D63/089; F28D; F28D9/00; F28D9/0031; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; F28F3/12; B01D2313/00; B01D2313/08; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/373; Y10S165/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735812A
Cited
US3216492A
Cited
US3332746A
Cited
US3412865A
Cited
US3398091A
Cited
US3362540A
Cited
US3435893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |