US2810337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated fume hoods
Assignee: Baker Petrolite LLC
•
Filing: 1956-01-10
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Granted: 1957-10-22
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Expires: 1976-01-10
Abstract
No abstract record available.
Inventors
- 👤 Gilbert J Samuelson
- 👤 Verner L Stromberg
- 👤 Charles M Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:08
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/023; B08B2215/00; B08B2215/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2549042A
Cited
US2565933A
Cited
US2562130A
Cited
US2704973A
Cited
US2627220A
Cited
US2649727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |