Patent US349572A successfully refreshed from Google Patents.
Patent US2721989A successfully refreshed from Google Patents.
US2721989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording magnitudes in ratio form
Assignee: United Shoe Machinery Corp
•
Filing: 1949-11-29
•
Granted: 1955-10-25
•
Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 William O Gates
- 👤 Robert R Perron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/42; G05B19/4202; G05B19/4207; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35354; G05B2219/36; G05B2219/36591; G05B2219/45; G05B2219/45243; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896; Y10T409/301176; Y10T409/301624; Y10T409/302632
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2440992A
Cited
US318539A
Cited
US2096020A
Cited
US2193868A
Cited
US2138668A
Cited
US2333463A
Cited
US2294149A
Cited
US2371415A
Cited
US2439446A
Cited
US2436829A
Cited
US2485539A
Cited
US2530516A
Cited
US2590091A
Cited
US2579831A
Cited
US2475245A
Cited
US2583983A
Cited
US2540654A
Cited
US2509780A
Cited
US2537770A
Cited
US2521946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |