Patent US3478816A successfully refreshed from Google Patents.
US3478816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerator matrix
Assignee: Motors Liquidation Co
•
Filing: 1968-02-19
•
Granted: 1969-11-18
•
Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Harold E Helms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/045; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021; Y10S165/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2937010A
Cited
US3162241A
Cited
US3242977A
Cited
US3216487A
Cited
US3392776A
Cited
US3368612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |