US3501877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masonry joint spacer
Assignee: Individual
•
Filing: 1968-03-28
•
Granted: 1970-03-24
•
Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 John S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:51
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/18; E04G21/1841; E04G21/1883; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/028; E04B2002/0282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732705A
Cited
US641067A
Cited
US1165475A
Cited
US1943485A
Cited
US1955587A
Cited
US2669116A
Cited
US2930135A
Cited
US2949763A
Cited
US3420031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |