Patent US3063981A successfully refreshed from Google Patents.
US3063981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of nitrocellulose
Assignee: Hercules Powder Co
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Filing: 1960-05-27
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Granted: 1962-11-13
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Expires: 1980-05-27
Abstract
No abstract record available.
Inventors
- 👤 Iii John D Cochrane
- 👤 Daniel S Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
C; C08; C08B; C08B17/00; C08B17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE MANUFACTURE OF NITROCELLULOSE IN WHICH A SLURRY OF NITROCELLULOSE IN SPENT NITRATING MIXTURE IS FED IN MEASURED INCREMENTS AT PREDETERMINED INTERVALS FROM A DISPENSING FEEDER INTO A CONTINOUS CENTRIFUGE HAVING CATING CYCLE FOR SEPERATION AND DISPLACEMENT OF SPENT NITRATING MIXTURE FROM THE NITROCELLULOSE AND IN WHICH EACH MEASURE OF SLURRY FEED IS SEPARATELY ACCUMULATED IN SAID DISPENSING FEEDER FOR DISCHARGE THEREFROM INTO SAID CENTRIFUGE, THE IMPROVEMENT IN FEEDING SAID MEASURE OF SLURRY TO SAID CENTRIFUGE WHICH COMPRISES INSTANTANEOUSLY RELEASING THE WHOLE ACCUMULATED MEASURE OF SLURRY FEED FOR DELIVERY AT A SUBSTANTIALLY CONSTANT AND UNRESTRICTED RATE OF FLOW FROM THE DISPENSING FEEDER INTO THE CENTRIFUGE WITHIN ABOUT 2 SECONDS.
Claim 2
Dependent Claim
110 words
IN THE MANUFACTURE OF NITROCELLULOSE IN WHICH A SLURRY OF NITROCELLULOSE IN SPENT NITRATING MIXTURE IS FED IN MEASURED INCREMENTS AT PREDETERMINED INTERVALS FROM A DISPENSING FEEDER INTO A CONTINOUS CENTRIFUGE HAVING CATING CYCLE FOR SEPERATION AND DISPLACEMENT OF SPENT NITRATING MIXTURE FROM THE NITROCELLULOSE AND IN WHICH EACH MEASURE OF SLURRY FEED IS SEPARATELY ACCUMULATED IN SAID DISPENSING FEEDER FOR DISCHARGE THEREFROM INTO SAID CENTRIFUGE, THE IMPROVEMENT IN FEEDING SAID MEASURE OF SLURRY TO SAID CENTRIFUGE WHICH COMPRISES INSTANTANEOUSLY RELEASING THE WHOLE ACCUMULATED MEASURE OF SLURRY FEED FOR DELIVERY AT A SUBSTANTIALLY CONSTANT AND UNRESTRICTED RATE OF FLOW FROM THE DISPENSING FEEDER INTO THE CENTRIFUGE WITHIN ABOUT 2 SECONDS.
References Cited (Backward Citations)
US2948437A
Cited
US2913149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |