US2544302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heading die and method of making it
Assignee: Carboloy Co Inc
•
Filing: 1945-08-30
•
Granted: 1951-03-06
•
Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 Hershel B Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:55
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US142407A
Cited
US329801A
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US865759A
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US1420224A
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US1395217A
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US1624027A
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US1582434A
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US1747911A
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US1904698A
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US1935621A
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US1918858A
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US2027787A
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US2044986A
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US2111046A
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US2101689A
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US2146995A
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US2232417A
Cited
US2245608A
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US2332704A
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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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |