US2470652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial contacting material
Assignee: Pan American Refining Corp
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Filing: 1946-11-30
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Granted: 1949-05-17
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Expires: 1966-11-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Scofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:37
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/008; B01F; B01F35/00; B01F35/71; B01F35/717; B01F35/7182; B01J; B01J19/00; B01J19/32; F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; B01F25/00; B01F25/40; B01F25/41; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/3221; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32231; B01J2219/32286; B01J2219/32289; B01J2219/324; B01J2219/32408
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) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |