US2682476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture for manufacture of pencil leads
Assignee: JS Staedtler GmbH and Co KG
•
Filing: 1950-11-21
•
Granted: 1954-06-29
•
Expires: 1970-11-21
Abstract
No abstract record available.
Inventors
- 👤 Nurnberg Georg Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:45
CPC Classifications
C; C09; C09D; C09D13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A MIXTURE FOR MANUFACTURING LEAD FOR WRITING AND DRAWING PENCILS CONSISTING OF A MASS OF WRITING MATERIALS, WATER-INSOLUBLE BINDER AND CALCIUM CHLORIDE.
Claim 2
Dependent Claim
22 words
A MIXTURE FOR MANUFACTURING LEAD FOR WRITING AND DRAWING PENCILS CONSISTING OF A MASS OF WRITING MATERIALS, WATER-INSOLUBLE BINDER AND CALCIUM CHLORIDE.
References Cited (Backward Citations)
GB191003905A
Cited
US2013584A
Cited
DE692556C
Cited
GB457878A
Cited
US2220992A
Cited
US2046557A
Cited
US2281940A
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US2384886A
Cited
US2462018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |