Patent US1709938A successfully refreshed from Google Patents.
US1709938A
Expired / Lapsed
US
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Method and machine for producing hair-gripping fasteners
Assignee: HUMP HAIRPIN MANUFACTURING Co
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Filing: 1927-12-31
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Granted: 1929-04-23
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Expires: 1947-12-31
Abstract
No abstract record available.
Inventors
- 👤 Solomon H Goldberg
- 👤 Walter H Hermsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:22
CPC Classifications
B; B21; B21G; B21G1/00; B21G1/003; B21G7/00; B21G7/02; B21G7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-04-22 | 1932-10-22 | 1933-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-04-22 | 1936-10-22 | 1937-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-04-22 | 1940-10-22 | 1941-04-23 | $7700.00 | Window Closed / Lapsed |