Patent US3500901A successfully refreshed from Google Patents.
US3500901A
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Assignee: Bethlehem Corp
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Filing: 1967-11-08
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Granted: 1970-03-17
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Expires: 1987-11-08
Abstract
No abstract record available.
Inventors
- 👤 William L Root
- 👤 Milton S Mery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:50
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/04; B; B01; B01F; B01F35/00; B01F35/90; B01F35/95; B29; B29B; B29B13/00; B29B13/06; B29B13/065; B01F27/00; B01F27/05; B01F27/11; B01F27/112; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |