US2707147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of domestic gas
Assignee: Hercules Powder Co
•
Filing: 1948-02-07
•
Granted: 1955-04-26
•
Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 James H Shapleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:23
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/22; C10; C10G; C10G2400/00; C10G2400/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1992909A
Cited
US151002A
Cited
US209630A
Cited
US314342A
Cited
US326488A
Cited
US495917A
Cited
US1767357A
Cited
US137521A
Cited
US1373704A
Cited
US1868462A
Cited
US2028326A
Cited
USRE21521E
Cited
US2544188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |