US1462890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral casing
Assignee: Individual
•
Filing: 1920-04-30
•
Granted: 1923-07-24
•
Expires: 1940-04-30
Abstract
No abstract record available.
Inventors
- 👤 Taylor Harvey Birchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:41
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; F03B3/186; F05; F05B; F05B2250/00; F05B2250/10; F05B2250/15; F05B2250/20; F05B2250/25; Y; Y02; Y02E; Y02E10/00; Y02E10/20
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) | 1926-07-23 | 1927-01-22 | 1927-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-07-23 | 1931-01-22 | 1931-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-07-23 | 1935-01-22 | 1935-07-24 | $7700.00 | Window Closed / Lapsed |