Patent US5412427A successfully refreshed from Google Patents.
Patent US2603235A successfully refreshed from Google Patents.
US2603235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kirkham
Assignee: —
•
Filing: —
•
Granted: 1952-07-15
•
Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:37
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779; Y10T137/7781; Y10T137/7793; Y10T137/7832
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US840877A
Cited
US1467522A
Cited
US2306379A
Cited
US1959105A
Cited
US2272684A
Cited
US2317563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |