Patent US2627089A successfully refreshed from Google Patents.
US2627089A
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Method for talc crayon production
Assignee: Individual
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Filing: 1949-02-04
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Granted: 1953-02-03
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Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Jack E Norwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:16
CPC Classifications
C; C09; C09D; C09D13/00; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/50; B29C48/505; B29C48/63; B29C48/68; B29C48/76; B29C48/03; B29C48/06; B29C48/12; Y; Y10; Y10S; Y10S425/00; Y10S425/803; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
THE METHOD OF MAKING A COMPOSITION WRITING INSTRUMENT CONSISTING OF THE FOLOWING PROCEDURE: PULVERIZING TALC TO AT LEAST 200 MESH, REMOVING SUBSTANTIALLY ALL THE IMPURITIES THEREFROM, ADDING SODIUM SILICATE IN THE PROPORTION OF APPROXIMATELY 2.16-4.5 GRAMS OF TALC PER C. C. OF SODIUM SILICATE, MIXING THE SUBSTANCES THOROUGHLY FORMING THE COMPOSITION INTO A PREDETERMINED
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |