Patent US4975915A successfully refreshed from Google Patents.
Patent US2957739A successfully refreshed from Google Patents.
US2957739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L fisher
Assignee: —
•
Filing: —
•
Granted: 1960-10-25
•
Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:40
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/26; H02B1/28; A; A47; A47B; A47B97/00; A47F; A47F10/00; A47F10/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US268799A
Cited
US916771A
Cited
US1679791A
Cited
US2318122A
Cited
US2374119A
Cited
US2566458A
Cited
US2538966A
Cited
US2629780A
Cited
US2549676A
Cited
US2634530A
Cited
US2739857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |