Patent US3453184A successfully refreshed from Google Patents.
US3453184A
Expired / Lapsed
US
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Removal of high and low boiling solvents from polycarbonate solutions
Assignee: Bayer Corp
•
Filing: 1967-03-10
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Granted: 1969-07-01
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Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 Alois M Gemassmer
- 👤 Herbert L Rawlings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:15
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/20; C08G64/205; C08G64/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2467769A
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US2500194A
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US2992679A
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US3022271A
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US3240755A
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US3201365A
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US3167531A
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US3234109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |