US2895303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of low-boiling gases
Assignee: Arthur D Little Inc
•
Filing: 1956-05-17
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Granted: 1959-07-21
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Milton H Streeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25J1/0002; F25J1/0005; F25J1/0007; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/004; F25J1/0221; F25J1/0224; F25J2205/00; F25J2205/20; F25J2210/00; F25J2210/42; F25J2220/00; F25J2220/02; F25J2245/00; F25J2245/90; F25J2270/00; F25J2270/04; F25J2270/06; F25J2270/90; F25J2270/912; F25J2290/00; F25J2290/62
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |