US2508347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making buffers
Assignee: Individual
•
Filing: 1946-09-11
•
Granted: 1950-05-16
•
Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 John W Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:57
CPC Classifications
B; B61; B61G; B61G11/00; B61G11/02; B61G11/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49615; Y10T29/49826; Y10T29/4984
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US392133A
Cited
DE385481C
Cited
GB191201043A
Cited
US1438177A
Cited
GB198823A
Cited
DE385482C
Cited
GB215486A
Cited
DE443592C
Cited
US1665762A
Cited
GB396902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |