US2730087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engines
Assignee: Individual
•
Filing: 1953-04-20
•
Granted: 1956-01-10
•
Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 Digby B Morton
- 👤 Jr Digby B Morton
- 👤 Graeme E Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:59
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/04; F01B7/12; F02; F02B; F02B75/00; F02B75/28; F02B75/32; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0886; Y10T292/0887; Y10T292/089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1294787A
Cited
US1950970A
Cited
US2079156A
Cited
US2099371A
Cited
DE618478C
Cited
US2113990A
Cited
GB477609A
Cited
US2262264A
Cited
US2469651A
Cited
US2551534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |