US1970376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tennis strings and the like
Assignee: Individual
•
Filing: 1932-07-15
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Granted: 1934-08-14
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Expires: 1952-07-15
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hamburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
A; A63; A63B; A63B51/00; A63B51/02; D; D07; D07B; D07B1/00; D07B1/14; D07B1/148
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) | 1937-08-13 | 1938-02-12 | 1938-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-13 | 1942-02-12 | 1942-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-13 | 1946-02-12 | 1946-08-14 | $7700.00 | Window Closed / Lapsed |