Patent US2227491A successfully refreshed from Google Patents.
Patent US2610049A successfully refreshed from Google Patents.
US2610049A
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Assignee: Individual
•
Filing: 1949-10-18
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Granted: 1952-09-09
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Expires: 1969-10-18
Abstract
No abstract record available.
Inventors
- 👤 Elles Albert Charles
- 👤 Frank L Fulke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/183; E21C35/1837; E21C35/184; E21C35/19; E21C35/193; E21C35/1933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US905876A
Cited
GB392773A
Cited
US1927818A
Cited
US1952002A
Cited
US2123213A
Cited
US2168060A
Cited
US2244617A
Cited
GB549892A
Cited
US2449288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |