Patent US3396498A successfully refreshed from Google Patents.
US3396498A
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US
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Assignee: Enviri Corp
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Filing: 1967-03-07
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Granted: 1968-08-13
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Expires: 1987-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederic A Davidson
- 👤 Roger D Schlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:43
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/34; B; B66; B66D; B66D3/00; B66D3/04; B66D2700/00; B66D2700/02; B66D2700/026; B66D2700/028; Y; Y10; Y10T; Y10T403/00; Y10T403/30; Y10T403/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2546929A
Cited
US2398413A
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US2857026A
Cited
US2982572A
Cited
US3156329A
Cited
US3302749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |