US2898893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Arthur D Little Inc
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Filing: 1958-04-11
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Granted: 1959-08-11
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Expires: 1978-04-11
Abstract
No abstract record available.
Inventors
- 👤 Douglas P Rohrer
- 👤 Fred F Chellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:12
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/10; B25B; B25B27/00; B25B27/0085; B25C; B25C1/00; B25C1/08; E; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/12; F; F02; F02B; F02B71/00; F02B71/04
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |