Patent US2525970A successfully refreshed from Google Patents.
US2525970A
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Process and apparatus for manufacture of shellac
Assignee: Locke Spier & Co (1928) Ltd
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Filing: 1947-03-03
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Granted: 1950-10-17
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Expires: 1967-03-03
Abstract
No abstract record available.
Inventors
- 👤 Spier Norman Nathan
- 👤 Phillips Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:40
CPC Classifications
B; B29; B29B; B29B9/00; C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
APPARATUS FOR OBTAINING SHELLAC IN A FINELY DIVIDED FORM WITH A LOW MOISTURE CONTENT, COMPRISING A CENTRIFUGE BOWL HAVING FINE PERFORATIONS IN ITS SIDE WALLS, IN WHICH SHELLAC IN A PLASTIC STATE IS PLACED, MEANS FOR ROTATING THE BOWL AT A HIGH SPEED, A HOT AIR PIPE UNDER THE BOWL AND HAVING HOLES FOR DIRECTING JETS OF HOT AIR AGAINST THE PERIPHERAL PART OF THE BOWL, A HOT AIR PIPE ABOVE THE BOWL AND HAVING HOLES FOR DIRECTING JETS OF HOT AIR ON TO THE SHELLAC IN THE BOWL, A BLOWER AN AIR HEATER FOR SUPPLYING HOT AIR TO THE HOT AIR PIPES AND A CASING AROUND THE CENTRIFUGE BOWL HAVING PROJECTIONS EXTENDING INWARDLY THEREOF AND ADAPTED TO CATCH THE ENDS OF THE THREADS OF SHELLAC WHICH ARE EXPELLED HORIZONTALLY AS THE BOWL ROTATES AND ASSIST IN BREAKING THEM OFF.
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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |